diff --git a/pkg/rtc/participant.go b/pkg/rtc/participant.go
index 1988052d9..a436098f3 100644
--- a/pkg/rtc/participant.go
+++ b/pkg/rtc/participant.go
@@ -282,7 +282,7 @@ type ParticipantImpl struct {
 	// queued participant updates before join response is sent
 	// guarded by updateLock
 	queuedUpdates []*livekit.ParticipantInfo
-	// cache of recently sent updates, to ensuring ordering by version
+	// cache of recently sent updates, to ensure ordering by version
 	// guarded by updateLock
 	updateCache *lru.Cache[livekit.ParticipantID, participantUpdateInfo]
 	updateLock  utils.Mutex
diff --git a/pkg/rtc/participant_signal.go b/pkg/rtc/participant_signal.go
index 3fa388adc..adadc44ac 100644
--- a/pkg/rtc/participant_signal.go
+++ b/pkg/rtc/participant_signal.go
@@ -118,6 +118,10 @@ func (p *ParticipantImpl) SendParticipantUpdate(participantsToUpdate []*livekit.
 			})
 			validUpdates = append(validUpdates, pi)
 		}
+
+		if pi.State == livekit.ParticipantInfo_DISCONNECTED {
+			p.updateCache.Remove(pID)
+		}
 	}
 	p.updateLock.Unlock()