# Infinite lipsync overshoot

**URL:** <https://forum.convai.com/t/infinite-lipsync-overshoot/6170>\
**Category:** Unreal Engine Plugin\
**Tags:** lipsync, unreal-engine, bug\
**Created:** [May 13, 2026, 2:45am UTC](https://forum.convai.com/t/infinite-lipsync-overshoot/6170 "2026-05-13T02:45:44Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Fizz](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/fizz/32/7110_2.png) [@Fizz](https://forum.convai.com/u/Fizz)\
**Post date:** [May 13, 2026, 2:45am UTC](https://forum.convai.com/t/infinite-lipsync-overshoot/6170/1 "2026-05-13T02:45:45Z")

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In 4.0.0-beta.19, when a character stops talking the output log shows this:

ConvaiFaceSyncLog: Tick: Can’t play lipsync - CurrentSequenceTimePassed: 185.100647 - MainSequenceBuffer.Duration: 27.183335  
ConvaiFaceSyncLog: Tick: Can’t play lipsync - CurrentSequenceTimePassed: 185.121979 - MainSequenceBuffer.Duration: 27.183335  
ConvaiFaceSyncLog: Tick: Can’t play lipsync - CurrentSequenceTimePassed: 185.121979 - MainSequenceBuffer.Duration: 27.183335  
ConvaiFaceSyncLog: Tick: Can’t play lipsync - CurrentSequenceTimePassed: 185.143311 - MainSequenceBuffer.Duration: 27.183335  
ConvaiFaceSyncLog: Tick: Can’t play lipsync - CurrentSequenceTimePassed: 185.143311 - MainSequenceBuffer.Duration: 27.183335

…endlessly, and the talking animations never end, breaking the app we have in the field but now cannot push updates for. Where can I roll back to the very previous version?

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**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\
**Post date:** [May 13, 2026, 8:29am UTC](https://forum.convai.com/t/infinite-lipsync-overshoot/6170/2 "2026-05-13T08:29:51Z")

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Hello,

**Welcome to the Convai Developer Forum!**

This is a known issue, and our team is already working on a fix.

We will release an update as soon as possible to address it.

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<div class="post-metadata">

**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\
**Post date:** [May 27, 2026, 5:26am UTC](https://forum.convai.com/t/infinite-lipsync-overshoot/6170/3 "2026-05-27T05:26:03Z")

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Are you still having issue?

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**Author:** ![system](https://canada1.discourse-cdn.com/flex004/uploads/convai/original/1X/e60ef96aa7334c5ccf6682f6c6dbc20fcfa96b49.png) [@system](https://forum.convai.com/u/system)\
**Post date:** [June 26, 2026, 5:26am UTC](https://forum.convai.com/t/infinite-lipsync-overshoot/6170/4 "2026-06-26T05:26:56Z")

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