When I opened this file the other day, all of the sudden there were strange boxes around certain elements. I have posted a request to support, but due to the fires I'm not sure they will get back soon. Any ideas? These are measures with complicated notation in them (mid-measure clefs, cross-staff notation, hidden rests, etc.). Note the boxes around the fermata and LH notes in the piano part. Any ideas? They don't seem to be font annotation boxes, and aren't attached to any articulations, expressions, etc. that I can find at all.

Using finale 26, happens on both Mac and PC