Three separate users complained that I was reverting their pages. I could not understand what was happening and asked usernamekiran for help. (Full discussion here: https://en.wikipedia.org/wiki/User_talk:Usernamekiran) Nothing was resolved.
Finally I went to un-check myself from Bbb23 talk page and HE complained I had reverted his page! As best as I can explain it:
"Each time I left a message or followed a page I checked the "Watch this page" box; when the subject changed or I finished I went back to the page to un-check the box and hit "Publish changes"!!! When I did this today on your talk page Bbb23 a message flashed "your revision was saved" as usual, but it looks like the program is revising text instead of just un-watching the page. It explains all this balagan (mess). Can something be done about it? Cheers! Shir-El too 17:29, 20 February 2020"
Since then I've learned to use the 'star,' but it still seems like a glitch.