Thank you thank you thank you, THANK YOU! 
Yes - Listing Title and Listing description are the 2 that it happens to me most in. I nearly exclusively live in Preview Mode when creating a listing [Editor Mode, for me, is when I am creating a new template]. I’m a touch typist, so I rarely look at my keyboard. I also tend to try to find ways not to use my trackpad but for item description and listing title, I do click into those fields. For Listing Title I always have the name of my template [eg: PlayStation 3 game, or Magazine Lot], as I have several attributes pre-filled, shipping policy filled, etc. I have a simple “Text goes here.” for listing descriptions. For title, just the name of the template. When I click in to remove the template text or to edit a listing title that I realized as I was inspecting the item, needs revised, the focus stays for just a bit, then poof, goes away.
It was mentioned by another GS user here that they experienced this too and a restart of the app fixes it for a bit, but then it starts again.
For listing description, I use an inventory app that I type that into, and then select my “Text goes here.” and paste my description on top. Sometimes after selecting the filler text, the selection goes away and I have to select it again before pasting.
For me, the title is the one that gives me the most grief as it happens very, very often. Like a recent listing of mine auto-corrected Elph into Alpha and after I noticed it, I tried to go in to edit it, and the focus just would not stick the first time.
macOS 14.7.5, GS 9.9.2
Thanks for looking into this!