When I click into an excerpt it blanks out. This behaviour is new. Up until earlier today it worked fine. Now in any study when I click into the excerpt to edit it, it just goes blank. If I click outside of the excerpt the text reappears in its original state.
In addition, when I click to add a note to an excerpt and I change the Note Title it makes a text block with the title in it separate from the excerpt.
Edit: this is the retail version, not the App Store version. Mac OS 10.15.7.
Edit 2: This only happens on one of two computers that MarginNote is installed on. It happens exactly as described.