Bug 503844

SUMMARY
If I use “use effect zone” on any effect that has the ability to set keyframes, I can’t move the keyframe timeline thing to farther than a specific amount of time, or do anything with keyframes. I can use the keyframes normally, but only BEFORE clicking on “use effect zone”, but after that I can’t edit the keyframes or do anything else after that limit.

STEPS TO REPRODUCE
1. In edit mode, have an image or video in the timeline
2. Apply any effect that has the ability to use keyframes (for example, Alpha shapes)
3. Click on "use effect zone" in the effect's setting (in the Effect/Composition Stack window)
4. Try to drag around the play head (little white thingy) in the effect's timeline

OBSERVED RESULT
The play head in the effect's timeline only goes up to 2.59 (for me), and there are other issues if trying to add and use the keyframes.

EXPECTED RESULT
The play head in the effect's timeline should be able to go across the whole clip.

SOFTWARE/OS VERSIONS
Windows: Windows 11 Home 23H2

ADDITIONAL INFORMATION
I didn't try all the effects, only with some of them.