diff --git a/go.mod b/go.mod
index f5526c0bd..fc4b7292a 100644
--- a/go.mod
+++ b/go.mod
@@ -21,7 +21,7 @@ require (
 	github.com/jxskiss/base62 v1.1.0
 	github.com/livekit/mageutil v0.0.0-20250511045019-0f1ff63f7731
 	github.com/livekit/mediatransportutil v0.0.0-20260501135216-8818f1b77e59
-	github.com/livekit/protocol v1.45.7-0.20260502022852-0f86fd3cc9b0
+	github.com/livekit/protocol v1.45.7-0.20260502131722-3c9faab50403
 	github.com/livekit/psrpc v0.7.1
 	github.com/mackerelio/go-osstat v0.2.7
 	github.com/magefile/mage v1.17.0
diff --git a/go.sum b/go.sum
index a1be89249..1bf28b4d7 100644
--- a/go.sum
+++ b/go.sum
@@ -181,8 +181,8 @@ github.com/livekit/mageutil v0.0.0-20250511045019-0f1ff63f7731 h1:9x+U2HGLrSw5AT
 github.com/livekit/mageutil v0.0.0-20250511045019-0f1ff63f7731/go.mod h1:Rs3MhFwutWhGwmY1VQsygw28z5bWcnEYmS1OG9OxjOQ=
 github.com/livekit/mediatransportutil v0.0.0-20260501135216-8818f1b77e59 h1:lWRMrb4ReRJu/e/BAp1kpT6fQOjS8WjCxdp0PGjgrBc=
 github.com/livekit/mediatransportutil v0.0.0-20260501135216-8818f1b77e59/go.mod h1:RCd46PT+6sEztld6XpkCrG1xskb0u3SqxIjy4G897Ss=
-github.com/livekit/protocol v1.45.7-0.20260502022852-0f86fd3cc9b0 h1:Ry3xfhN75GQeCZ4MDyMWVRU3bn3Q6X4bMeMNQFrs41I=
-github.com/livekit/protocol v1.45.7-0.20260502022852-0f86fd3cc9b0/go.mod h1:Q4uw9Bkz7ucNxPP/lcVj6IkVMYzlq3TwYo2TRFL6BN0=
+github.com/livekit/protocol v1.45.7-0.20260502131722-3c9faab50403 h1:tWebMNKx9GWtvgSXN6BgmXYX1fuXS5buM2MqGzuypgM=
+github.com/livekit/protocol v1.45.7-0.20260502131722-3c9faab50403/go.mod h1:Q4uw9Bkz7ucNxPP/lcVj6IkVMYzlq3TwYo2TRFL6BN0=
 github.com/livekit/psrpc v0.7.1 h1:ms37az0QTD3UXIWuUC5D/SkmKOlRMVRsI261eBWu/Vw=
 github.com/livekit/psrpc v0.7.1/go.mod h1:bZ4iHFQptTkbPnB0LasvRNu/OBYXEu1NA6O5BMFo9kk=
 github.com/mackerelio/go-osstat v0.2.7 h1:TCavZi10wF49bT6iQZ9eT2keGZQpC69MTDfdJej5e94=
diff --git a/pkg/rtc/participant.go b/pkg/rtc/participant.go
index bffda51b6..3af2b8edc 100644
--- a/pkg/rtc/participant.go
+++ b/pkg/rtc/participant.go
@@ -171,6 +171,7 @@ type ParticipantParams struct {
 	LimitConfig             config.LimitConfig
 	ProtocolVersion         types.ProtocolVersion
 	SessionStartTime        time.Time
+	SessionTimer            *observability.SessionTimer
 	TelemetryListener       types.ParticipantTelemetryListener
 	Trailer                 []byte
 	PLIThrottleConfig       sfu.PLIThrottleConfig
@@ -405,15 +406,15 @@ func NewParticipant(params ParticipantParams) (*ParticipantImpl, error) {
 		p.supervisor.OnPublicationError(p.onPublicationError)
 	}
 
-	sessionTimer := observability.NewSessionTimer(p.params.SessionStartTime)
 	params.Reporter.RegisterFunc(func(ts time.Time, tx roomobs.ParticipantSessionTx) bool {
 		if dts := p.disconnectedAt.Load(); dts != nil {
 			ts = *dts
 			tx.ReportEndTime(ts)
 		}
 
-		millis, mins := sessionTimer.Advance(ts)
+		millis, secs, mins := p.params.SessionTimer.Advance(ts)
 		tx.ReportDuration(uint16(millis))
+		tx.ReportDurationSeconds(uint16(secs))
 		tx.ReportDurationMinutes(uint8(mins))
 
 		return !p.IsClosed()
diff --git a/pkg/service/roommanager.go b/pkg/service/roommanager.go
index 9806d884e..472fd2efb 100644
--- a/pkg/service/roommanager.go
+++ b/pkg/service/roommanager.go
@@ -34,6 +34,7 @@ import (
 	"github.com/livekit/protocol/auth"
 	"github.com/livekit/protocol/livekit"
 	"github.com/livekit/protocol/logger"
+	"github.com/livekit/protocol/observability"
 	"github.com/livekit/protocol/observability/roomobs"
 	"github.com/livekit/protocol/rpc"
 	"github.com/livekit/protocol/utils"
@@ -472,6 +473,7 @@ func (r *RoomManager) StartSession(
 		LimitConfig:             r.config.Limit,
 		ProtocolVersion:         pv,
 		SessionStartTime:        sessionStartTime,
+		SessionTimer:            observability.NewSessionTimer(sessionStartTime),
 		TelemetryListener:       room.ParticipantTelemetryListener(),
 		Trailer:                 room.Trailer(),
 		PLIThrottleConfig:       r.config.RTC.PLIThrottle,