This has been happening to me for a couple of weeks as well and is driving me crazy, since it really shockingly yanks the screen away from whatever app I'm working in to give me its idiotic report. I'm on a 2019 Macbook Pro 10.15.7. Evernote is, in fact, up to date (10.5.7). How close are you to fixing this? I have been dithering about finding an alternative to Evernote since exporting will be a pain, but this is daily motivation.
I am also having the same issue without having yet upgraded to Big Sur -- still on Catalina. It was fine for the first day or so but it's unusable right now. I sent the logs to support.