My Dear Matt Finley!!!!
Your diagnostic suggestion resulted in a definitive conclusion!!!
Returning to (Most) Factory Settings "fixed" the problem. The question is Why it fixed it.
When I changed the Preferences > Display to transpose for trumpet, the problem was back.
Changed back to Concert 0 transpose and problem is gone!!!!
(If you get a chance, try switching your Display transpose to trumpet and see if the situation is duplicated.)

I'm not sure why that is the way it is, but That's the Way It Is!!!!

WOW, thanks so much for sticking with this, Matt! It's been a very interesting process!
We may all now return to our normal quarantined lives!

Warm regards from Marty