Update to 2019.3 broke animations

After updating to the most recent stable version (2019.3.11f), the 3D models in my project have lost all but one of their animations. The clips are still there, but they all play the same animation. There’s no option to reassign the source take for each clip. Refreshing and reimporting the models does nothing.

I made a backup before updating, but I’d rather keep working on the new version. Any ideas on what the issue might be?

Don’t upgrade projects, this should only ever be done as a last resort if there is something in the new version you need to complete your game, otherwise don’t update projects, there is no rule saying you have to be current.