diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt
index 0d71dfc7..ce7021be 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt
@@ -292,6 +292,7 @@ object NativeLib {
     // dBFS, valid, RX-блокировка, вероятность речи 0..1, vadValid, усиление VAD в dB, компрессор VAD включён.
     fun radioInputStatus(): FloatArray = nativeRadioInputStatus()
     fun radioCaptureStop() { nativeRadioCaptureStop() }
+    fun radioCaptureDiscontinuity(groupId: Long) { nativeRadioCaptureDiscontinuity(groupId) }
     fun radioTransmitting(): Boolean = nativeRadioTransmitting()
     fun radioAutoMode(): Int = nativeRadioAutoMode()
     fun radioTalkBegin(groupId: Long) { nativeRadioTalkBegin(groupId) }
@@ -423,6 +424,7 @@ object NativeLib {
     private external fun nativeRadioConfigure(requestId: Long, settings: IntArray): Boolean
     private external fun nativeRadioInputStatus(): FloatArray
     private external fun nativeRadioCaptureStop()
+    private external fun nativeRadioCaptureDiscontinuity(groupId: Long)
     private external fun nativeRadioTransmitting(): Boolean
     private external fun nativeRadioAutoMode(): Int
     private external fun nativeRadioTalkBegin(groupId: Long)
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/RadioAudioEngine.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/RadioAudioEngine.kt
index 1148bda8..394821a6 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/RadioAudioEngine.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/RadioAudioEngine.kt
@@ -656,6 +656,8 @@ class RadioAudioEngine {
     }
 
     private fun captureLoop(subscription: MicrophoneCapture.Subscription, group: Long, ch: Int) {
+        var expected = -1L
+        var discontinuity = false
         var frameN = 0L
         var reportedRequestNs = 0L
         var statsMs = SystemClock.elapsedRealtime()
@@ -678,6 +680,14 @@ class RadioAudioEngine {
                 continue
             }
             val captured = event as MicrophoneCapture.Frame
+            val ageNs = System.nanoTime() - captured.createdNs
+            if (ageNs > 100_000_000) {
+                if (!discontinuity) LogManager.addLog("WARN", "radio", "stale capture group=$group ageMs=${ageNs / 1_000_000}")
+                discontinuity = true
+                continue
+            }
+            if (discontinuity || (expected >= 0 && captured.sequence != expected)) NativeLib.radioCaptureDiscontinuity(group)
+            discontinuity = false; expected = captured.sequence + FRAME_SAMPLES
             val buf = captured.pcm
             maxReadNs = maxOf(maxReadNs, SystemClock.elapsedRealtimeNanos() - readStartedNs)
             val inputDb = rmsDb(buf)
diff --git a/tools/chatgui-android/jni_bridge/android_jni_bridge.c b/tools/chatgui-android/jni_bridge/android_jni_bridge.c
index d871b6f9..aa46d5ff 100644
--- a/tools/chatgui-android/jni_bridge/android_jni_bridge.c
+++ b/tools/chatgui-android/jni_bridge/android_jni_bridge.c
@@ -2882,6 +2882,12 @@ JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeRadioCaptureStop(
     radio_audio_capture_stop();
 }
 
+JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeRadioCaptureDiscontinuity(
+    JNIEnv* env, jobject thiz, jlong groupId) {
+    (void)env; (void)thiz;
+    radio_audio_capture_discontinuity((uint64_t)groupId);
+}
+
 JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeRadioAudioFeed(
     JNIEnv* env, jobject thiz, jlong groupId, jshortArray samples) {
     (void)thiz;