Shrinking and rotating

This what I assume is a bug in the action editor is literally killing my soul.

In one second, I am in an action and everything is fine. I switch over to a different action, and suddenly my player rig has shrunk considerable, rotated sideways, and is not performing the actual action anymore. Then, I go back to the old action, and it is still sideways and shrunken.

Is this a bug? Or am I doing something terribly wrong?

How could we possibly know that without seeing the file? We know nothing about this action you’re talking about.