2.5 years later. What I did is extended my Frame Hold clip to however long I needed it, then turned it into a Nest. Then I keyframed the Nested Sequence and that worked.
I have been nesting for many years, but it was getting annoying, so I went out to find solutions on the forums and found this - HOWEVER - nesting doesn't really work when, for example, you need to return your scale BACK to 100, because you are nesting a clip that is ALREADY scalled up - it will nest it AS IS, so by scaling back that nest clip, your clip will have black on the sides! --- at the end of it all, I had to export a still JPEG and work around it!
This seems like a crazy bug, because Premiere should not limit my frame holds.
MORE CONTEXT:
For this particular instance I've "Add Frame Hold" on the very last frame of the clip. Even though in Effect Controls I can add keyframes, but they don't work. When the playhead moves, the keyframe digits are moving but nothing is moving on screen.
Please fix this, Adobe.
