Shotcut version 21.05.01
After applying a filter with keyframes with curves and pressing the Zoom Keyframe Values button, keyframes will only move horizontally not vertically.
In the demo, I first apply the Brightness filter without pressing the Zoom Keyframe Values button to show keyframes move fine then I reapply the filter but this time pressing the Zoom button first. I try to move the keyframe up and down and it won’t. I then move the value manually in the parameter itself on each keyframe I have set to show that even though the value is being changed the keyframe isn’t moving up or down. I then move the keyframes left and right to show that they only move in that direction. Finally, I end it by once again moving the value in the parameter itself on each keyframe to show that it still doesn’t make them move up and down.