We moved yesterday, it went fine.
Something's going on with her back, she isn't stretching into the contact. She's swinging her haunches in when going to the right, thereby disengaging herself, and not carrying herself properly and losing her balance. Isn't happening to the left - stretchy circles to the left are fine, but to the right, the stretchy circle is as it was back in May.
Back to lunging at the beginning of the ride to reestablish proper stretching and we'll see if that makes a difference.