diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioEngine.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioEngine.kt
index e7d5b773..45581200 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioEngine.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioEngine.kt
@@ -625,10 +625,11 @@ class CallAudioEngine {
                     playFramesPlayed = played
                     operationNs = System.nanoTime()
                     val device = trace.device
-                    val anchor = playbackClock.update(playFramesWritten, played, nowUs, routeGeneration,
-                        device.generation, device.stampFrame, device.stampNs / 1000)
+                    val generation = routeGeneration
+                    val anchor = playbackClock.update(playFramesWritten, played, nowUs, generation,
+                        device.generation, device.stampFrame, device.stampNs / 1000).takeIf { generation == routeGeneration }
                     outputUs = if (anchor?.measured == true) (anchor.atUs - nowUs).coerceAtLeast(0) else -1
-                    outputSample = OutputSample(nowUs, routeGeneration, CallOutputLatency(
+                    outputSample = OutputSample(nowUs, generation, CallOutputLatency(
                         ((playFramesWritten - played) * 1000 / SAMPLE_RATE).toInt(),
                         if (outputUs >= 0) (outputUs / 1000).toInt() else -1))
                     if (anchor != null) NativeLib.callAudioProgress(callId, epoch, anchor.position, anchor.atUs, nowUs, anchor.measured)
@@ -636,12 +637,13 @@ class CallAudioEngine {
                     val mode = if (anchor == null) "unavailable" else if (anchor.measured) "timestamp" else "head-estimate"
                     if (mode != clockMode) {
                         LogManager.addLog(if (mode == "unavailable") "WARN" else "INFO", "CallAudio",
-                            "playback clock id=$callId mode=$mode routeGeneration=$routeGeneration outputUs=$outputUs")
+                            "playback clock id=$callId mode=$mode routeGeneration=$generation outputUs=$outputUs")
                         clockMode = mode
                     }
                 } else if (!clockFailed) {
                     clockFailed = true
                     playFramesPlayed = -1
+                    outputUs = -1; outputSample = null
                     // Отрицательная позиция немедленно инвалидирует снимок в native.
                     NativeLib.callAudioProgress(callId, epoch, -1, nowUs, nowUs, false)
                     LogManager.addLog("ERROR", "CallAudio",
@@ -711,11 +713,13 @@ class CallAudioEngine {
             } else {
                 playbackBuffer?.applied(now, change, actual, capacity)
             }
-            val level = if (actual == requested && (change == null || change.underruns == 0)) "INFO" else "WARN"
+            val performance = track.performanceMode
+            val level = if (actual == requested && (change == null || change.underruns == 0) &&
+                performance == AudioTrack.PERFORMANCE_MODE_LOW_LATENCY) "INFO" else "WARN"
             LogManager.addLog(level, "CallAudio",
                 "playback buffering id=$callId reason=$reason requestedFrames=$requested actualFrames=$actual " +
                     "previousFrames=$previous startFrames=$start capacityFrames=$capacity underruns=${change?.underruns ?: 0} " +
-                    "performanceRequested=${AudioTrack.PERFORMANCE_MODE_LOW_LATENCY} performanceActual=${track.performanceMode} pacing=device")
+                    "performanceRequested=${AudioTrack.PERFORMANCE_MODE_LOW_LATENCY} performanceActual=$performance pacing=device")
             if (playReady && (previous != actual || reason == "route")) {
                 // Очередь сначала принимает новый размер; устаревшая задача не затронет следующий звонок.
                 mainHandler.post {