diff --git a/apps/simplex-support-bot/bot.test.ts b/apps/simplex-support-bot/bot.test.ts
index 418d1965b9..33acd421d3 100644
--- a/apps/simplex-support-bot/bot.test.ts
+++ b/apps/simplex-support-bot/bot.test.ts
@@ -1409,26 +1409,42 @@ describe("Error Handling", () => {
     expectNotSentToGroup(CUSTOMER_GROUP_ID, "temporarily unavailable")
   })
 
-  test("groupDuplicateMember on /team → apiListMembers fallback", async () => {
-    await reachQueue()
-    addBotMessage("The team will reply to your message")
+  test("/team while members are in Invited status → no second apiAddMember call", async () => {
+    await reachTeamPending()
+    addBotMessage("We will reply within 24 hours.")
 
-    // First team member add succeeds, second fails with groupDuplicateMember
-    let callCount = 0
-    const origAddMember = chat.apiAddMember.bind(chat)
-    chat.apiAddMember = async (groupId: number, contactId: number, role: string) => {
-      callCount++
-      if (callCount === 2) {
-        chat.members.set(groupId, [
-          {memberId: `team-${contactId}`, groupMemberId: 5000 + contactId, memberContactId: contactId, memberStatus: GroupMemberStatus.Connected, memberProfile: {displayName: `Contact${contactId}`}},
-        ])
-        throw {chatError: {errorType: {type: "groupDuplicateMember"}}}
-      }
-      return origAddMember(groupId, contactId, role)
-    }
+    // Simulate the realistic post-/team state: both members have been invited
+    // but have not yet accepted (memberStatus = "invited"). The SimpleX API
+    // would resend the invitation if apiAddMember is called for an Invited
+    // member — the pre-check in addOrFindTeamMember must skip them.
+    const invited = (contactId: number) => ({
+      memberId: `team-${contactId}`,
+      groupMemberId: 5000 + contactId,
+      memberContactId: contactId,
+      memberStatus: "invited",
+      memberProfile: {displayName: `Contact${contactId}`},
+    })
+    chat.members.set(CUSTOMER_GROUP_ID, [invited(TEAM_MEMBER_1_ID), invited(TEAM_MEMBER_2_ID)])
+    chat.added.length = 0
 
     await bot.onNewChatItems(customerMessage("/team"))
-    expectSentToGroup(CUSTOMER_GROUP_ID, "We will reply within")
+    expect(chat.added.filter(a => a.groupId === CUSTOMER_GROUP_ID)).toEqual([])
+  })
+
+  test("/grok in TEAM-PENDING while Grok is in Invited status → no second apiAddMember call", async () => {
+    await reachTeamPending()
+    addBotMessage("We will reply within 24 hours.")
+    chat.members.set(CUSTOMER_GROUP_ID, [
+      makeTeamMember(TEAM_MEMBER_1_ID, "Alice"),
+      {memberId: "grok-member", groupMemberId: 7777, memberContactId: GROK_CONTACT_ID, memberStatus: "invited", memberProfile: {displayName: "Grok"}},
+    ])
+    chat.added.length = 0
+
+    await bot.onNewChatItems(customerMessage("/grok"))
+    await bot.flush()
+
+    expect(chat.added.filter(a => a.contactId === GROK_CONTACT_ID)).toEqual([])
+    expectNotSentToGroup(CUSTOMER_GROUP_ID, "Inviting Grok")
   })
 })
 
diff --git a/apps/simplex-support-bot/plans/20260207-support-bot-implementation.md b/apps/simplex-support-bot/plans/20260207-support-bot-implementation.md
index f3ad98495f..8caab92b6d 100644
--- a/apps/simplex-support-bot/plans/20260207-support-bot-implementation.md
+++ b/apps/simplex-support-bot/plans/20260207-support-bot-implementation.md
@@ -700,7 +700,7 @@ Type signatures affected:
 **Main profile side (invite + failure detection):**
 0. Send `grokInvitingMessage` ("Inviting Grok, please wait...")
 1. **Set `grokInitialResponsePending.add(groupId)` FIRST** — the gate must be raised before any operation that could make Grok recognizable to `onGrokNewChatItems`. Specifically: before `apiAddMember`, before `pendingGrokJoins` is set, and before `bufferedGrokInvitations` is drained (which populates `reverseGrokMap`). Without this ordering, the sequence `apiAddMember → pendingGrokJoins.set → drain → reverseGrokMap.set → gate.add` contains a window where `reverseGrokMap` identifies the group as a Grok-active group but the gate is still DOWN. A customer message arriving in that window triggers a per-message response concurrent with the initial combined response — producing duplicate Grok replies. Every error path below MUST clear the gate.
-2. `apiAddMember(groupId, grokContactId, Member)` → get `member.memberId`. On `groupDuplicateMember` (customer sent `/grok` again before join completed), **clear the gate** and silent return — the in-flight activation handles the outcome. On any other error, clear the gate, revert state, send `grokUnavailableMessage`.
+2. **Pre-check via `apiListMembers`**: silent return if Grok is already in the group in any non-terminal status (covers `GSMemInvited`, which the SimpleX API would otherwise resend the invitation for without throwing). Then `apiAddMember(groupId, grokContactId, Member)` → get `member.memberId`. On `groupDuplicateMember` (race between pre-check and add — Grok joined as Connected meanwhile), **clear the gate** and silent return — the in-flight activation handles the outcome. On any other error, clear the gate, revert state, send `grokUnavailableMessage`.
 3. Store `pendingGrokJoins.set(memberId, mainGroupId)`
 4. Drain `bufferedGrokInvitations` — if the `receivedGroupInvitation` event arrived during step 2's await (race condition), process it now. (The gate is already up from step 1, so `onGrokNewChatItems` suppresses any per-message responses during drain and the subsequent join.)
 5. `waitForGrokJoin(120s)` — awaits resolver from Grok profile's `connectedToGroupMember` (step 8 below)
@@ -958,7 +958,7 @@ If a user contacts the bot via a regular direct-message address (not business ad
 | Team member leaves (message sent) | State stays `TEAM` (`customData.state` persists). Customer's next `/team` re-adds silently. |
 | No `--auto-add-team-members` (`-a`) configured | `/team` → "no team members available yet" |
 | `grokContactId` unavailable | `/grok` → "temporarily unavailable" |
-| `groupDuplicateMember` | Catch, `apiListMembers` to find existing member |
+| Member already in group when `/team` re-runs | `addOrFindTeamMember` pre-checks via `apiListMembers` and skips `apiAddMember` entirely if the contact is present in any non-terminal status (so an `Invited`-but-not-yet-accepted member is never re-invited — the SimpleX API would otherwise resend the invitation for `GSMemInvited`) |
 
 ## 16. API Call Map
 
@@ -1084,7 +1084,7 @@ npx ts-node src/index.ts \
 23. DM handshake via `connectedToGroupMember` → verify contact ID message sent (dedup with #22)
 24. Restart → verify same team group + Grok contact from state file, cards resume via `customData`
 25. No `--auto-add-team-members` (`-a`) → `/team` → verify "no team members available"
-26. `groupDuplicateMember` → verify `apiListMembers` fallback
+26. Repeated `/team` while members are still in `Invited` status → verify `apiAddMember` is NOT called again (pre-check in `addOrFindTeamMember` returns the existing member)
 27. Team member leaves (no message sent) → verify revert to QUEUE
 28. Team member leaves (message sent), customer sends `/team` → verify re-adds team members
 29. Card preview sender prefixes → verify first message in each consecutive sender run gets `Name:` prefix, subsequent same-sender messages do not
@@ -1333,8 +1333,8 @@ Called as: `const p = simulateGrokJoinSuccess(); await bot.onNewChatItems(...);
 
 #### 17. Error Handling (3 tests)
 - apiAddMember fails (Grok) → grokUnavailableMessage
-- groupDuplicateMember on Grok invite → only inviting message, no result (in-flight activation handles outcome)
-- groupDuplicateMember on /team → apiListMembers fallback
+- /grok while Grok already present (any non-terminal status, including `Invited`) → pre-check silent-returns, no `apiAddMember` call. Plus race coverage: simulated `groupDuplicateMember` thrown by `apiAddMember` → silent return, no further state change
+- /team while team member already present (any non-terminal status, including `Invited`) → `apiAddMember` not called for that member
 
 #### 18. Profile / Event Filtering (4 tests)
 - newChatItems from Grok profile → ignored by main handler
diff --git a/apps/simplex-support-bot/src/bot.ts b/apps/simplex-support-bot/src/bot.ts
index 205a3f144b..60a41eeaa1 100644
--- a/apps/simplex-support-bot/src/bot.ts
+++ b/apps/simplex-support-bot/src/bot.ts
@@ -10,6 +10,23 @@ import {
 } from "./messages.js"
 import {profileMutex, log, logError} from "./util.js"
 
+// True for any non-terminal status — invited but not yet accepted, through
+// connected. Used to decide whether a contact is already in the group so we
+// don't trigger a re-invite (the SimpleX API resends the invitation for a
+// member in GSMemInvited).
+function isInGroup(m: T.GroupMember): boolean {
+  switch (m.memberStatus) {
+    case T.GroupMemberStatus.Rejected:
+    case T.GroupMemberStatus.Removed:
+    case T.GroupMemberStatus.Left:
+    case T.GroupMemberStatus.Deleted:
+    case T.GroupMemberStatus.Unknown:
+      return false
+    default:
+      return true
+  }
+}
+
 export class SupportBot {
   // Card manager
   cards: CardManager
@@ -573,6 +590,16 @@ export class SupportBot {
       return
     }
 
+    // Pre-check: silent return if Grok is already in the group in any
+    // non-terminal status. The apiAddMember/groupDuplicateMember catch below
+    // handles Connected/etc. but the SimpleX API resends the invitation for
+    // GSMemInvited (no error thrown), so without this check a /grok issued
+    // while a previous activation is still pending would re-trigger the invite.
+    const grokMembers = await this.withMainProfile(() => this.chat.apiListMembers(groupId))
+    if (grokMembers.some(m => m.memberContactId === this.config.grokContactId && isInGroup(m))) {
+      return
+    }
+
     // Gate MUST be up before apiAddMember / pendingGrokJoins / reverseGrokMap —
     // any later and onGrokNewChatItems can fire a duplicate per-message reply.
     this.grokInitialResponsePending.add(groupId)
@@ -767,19 +794,16 @@ export class SupportBot {
   // --- Helpers ---
 
   private async addOrFindTeamMember(groupId: number, teamContactId: number): Promise<T.GroupMember | null> {
-    try {
-      return await this.withMainProfile(() =>
-        this.chat.apiAddMember(groupId, teamContactId, T.GroupMemberRole.Member)
-      )
-    } catch (err: unknown) {
-      const chatErr = err as {chatError?: {errorType?: {type?: string}}}
-      if (chatErr?.chatError?.errorType?.type === "groupDuplicateMember") {
-        log(`Team member already in group ${groupId}, looking up existing`)
-        const members = await this.withMainProfile(() => this.chat.apiListMembers(groupId))
-        return members.find(m => m.memberContactId === teamContactId) ?? null
-      }
-      throw err
-    }
+    // Pre-check membership: skip apiAddMember entirely if the contact is in
+    // the group in any non-terminal status. The SimpleX API resends the
+    // invitation for a member in GSMemInvited, so calling apiAddMember on a
+    // pending invitee would re-trigger an invite notification.
+    const members = await this.withMainProfile(() => this.chat.apiListMembers(groupId))
+    const existing = members.find(m => m.memberContactId === teamContactId && isInGroup(m))
+    if (existing) return existing
+    return await this.withMainProfile(() =>
+      this.chat.apiAddMember(groupId, teamContactId, T.GroupMemberRole.Member)
+    )
   }
 
   async sendToGroup(groupId: number, text: string): Promise<void> {