diff --git a/crates/chanora_audio/src/ios_voice_unit.rs b/crates/chanora_audio/src/ios_voice_unit.rs
index 0b73985..39a9e37 100644
--- a/crates/chanora_audio/src/ios_voice_unit.rs
+++ b/crates/chanora_audio/src/ios_voice_unit.rs
@@ -861,13 +861,14 @@ impl IosVoiceUnit {
             } else {
                 render_recorder_active = false;
             }
-
             // Track audio-vs-silence for the diagnostic.
             if mix_stats.peak_i16 > 0 {
                 callbacks_with_audio = callbacks_with_audio.wrapping_add(1);
             } else {
-                audio_processing_stats_for_render.increment_output_underrun();
                 callbacks_with_silence = callbacks_with_silence.wrapping_add(1);
+                if !muted {
+                    audio_processing_stats_for_render.increment_output_underrun();
+                }
             }
 
             // Diagnostic sampling.