In 5.2, all my animations are in T-Pose w/ no data?

Surely someone else has noticed this?
It happened with 5.2 and now 5.2.1 and with animations from a few different sources as well as homemade. The only differences I see are that working animations have “Resampled Animation Track Data”, while non-working don’t have any and say “Animationing is being edited.”

Working in 5.1.1

Not working in 5.2.1

Something must have changed with 5.2 that’s causing this?

Update: If I export and import, that seems to be working now. I guess that will work and not be too difficult. I’m used to copying assets.