Hi there. I remember myself when I used Vegas 17 that I was able to click on "key frame inrepolation" and adjust the smoothness on pan/crop. On Vegas 22 I still can adjust that but there is no effect on output.
When masking, yes, the feather (smoothness) works perfect.

The problem occurs when you just press the "pan/crop" of an event.

I think that, some kind of update from Windows caused that. Am I the only one with this problem?

Thanks for your time.