Original bug was only partially fixed a few months ago, and there is still a way to produce this same bug with some additional actions.
- On the timeline, arrange 3 clips so that there is space between A and B and no space between B and C.
- Trim clip B’s In point toward A so that it reaches the Out ponit of clip A.
- Undo again.
- Check the In point, Out point, and duration of clip C. B’s properties are copied to C.
- Clip B also has the duration of clip B before trimming plus the length of the trimming.
A. Tested on Windows 10
B. Tested on two of my PCs that have different CPUs.