I reported this on the beta thread for 22.09 but since it was decided that the bug would not be fixed for the release of v.22.09.23 I’ll make a separate thread for this bug. This is a pretty big bug as it will mess up and even erase all the keyframes set on a clip if you create or extend a transition by pulling on the left side of a transition clip. The only way to avoid this is to literally not ever pull on the left side of a transition clip to make a transition clip longer or ever create a transition by pulling on the left side of the clip with keyframes.
- Apply a filter with keyframes and add some keyframes either in the middle or towards the end of the clip. Split the clip on the left side and make a transition by dragging the left end over the clip on the left side. The keyframes will be moved all the way down and can even end up being erased. Demo.