Thanks a lot for the data!
Could you also share:
- The character image/config file
- The dialogue line, audio, and generated lip sync text file for the issue?
That way, I can replicate the problem and test it myself too.
When delivering your files, you can also open a GitHub issue or DM me on Discord (san0901) if needed.
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See this post for more troubleshooting details and quick workarounds: