Weird behavior in Find/Replace dialogue box - InD 20.0.1 (2024)

I'm working on a long manuscript.  I was having certain problems yesterday with this document crashing InD, so I uninstalled and reinstalled the program and recreated the document (luckily I wasn't very deep into it at that point). 

All was well until today when I needed to make frequent use of the Find/Replace box.  Now, a different problem has sprung up. As I'm typing in the search phrase, my cursor jumps back to the beginning of the field, and my search phrase ends up garbled.  For example, I searched for the phrase, "inseparable from laptop use," but because the cursor jumped around, the phrase ended up as "laptop use inseparable from."  I first thought it was user error and tried to type it again, but the same thing happened again with various results -- none of it matching what I was trying to type.  I finally had to type very, very slowly and pause between each keystroke before I could get the phrase correctly entered into the field.

Has anyone else experienced this problem with recent program updates?  Does anyone know what is causing it or how to fix or avoid it?

Thanks much in advance for any info.  (P.S. I am sure it is not a keyboard problem as I'm using a new keyboard, and I'm having no difficulty in any other programs.)