15.07.2021, 16:57
Can't reproduce.
Cu Selur
- I started Hybrid.
(Filtering->Misc->Auto-refresh Preview is disabled, using Filter Order)
- opened a source
- opened Vapoursynth Preview
- enabled Filtering->Vapoursynth->Color->Basic->Levels
- hit refresh button
- hit refresh button
Cu Selur

![[Image: cmv5nkd.jpg]](https://i.imgur.com/cmv5nkd.jpg)