I'd like to add the details of the issue.
1) The Active form is public.
2) Documentation update for a relevant instance has been done before creating a package.
3) Recreation of the Active form didn't help also.
I've recorded the video, where you can see that I've changed an existing form and have created a new one. I try to add both of them to the migration package, but Pulse doesn't see any changes in the model, so we can't choose the objects to add to the package.
Link to the video: google drive