fix: push BotStartedSpeakingFrame in HeyGenVideoService

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to **Pipecat** will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed an issue in `HeyGenVideoService` where the `BotStartedSpeakingFrame`
+  was blocked from moving through the Pipeline.
+
 ## [0.0.85] - 2025-09-12
 
 ### Added

src/pipecat/services/heygen/video.py

@@ -240,6 +240,7 @@ class HeyGenVideoService(AIService):
             # As soon as we receive actual audio, the base output transport will create a
             # BotStartedSpeakingFrame, which we can use as a signal for the TTFB metrics.
             await self.stop_ttfb_metrics()
+            await self.push_frame(frame, direction)
         else:
             await self.push_frame(frame, direction)