on 09-12-2023 18:38
on 09-12-2023 18:48
You could try deleting and reinstalling the app, other than that, contact FB to report it.
on 09-12-2023 18:50
on 09-12-2023 18:50
I have done all that mo joy
on 09-12-2023 18:53
on 09-12-2023 18:53
This is a known and longstanding problem. If you Google for "Deleted messages keep reappearing on fb messenger" you will get lots of hits, including this from The Verge that dates from 2018 :-
Facebook confirms years-old messages are randomly coming back to haunt users - The Verge
There are some suggestions as to how to deal with this ; you would need to read a few or the articles to try to ascertain what might work for you.
on 09-12-2023 18:54
on 09-12-2023 18:54
Remove the use FB Messenger as an SMS client and stop the syncing of SMS to FB Messenger
Have a look here: https://www.facebook.com/help/442105343709195/
Other than that try reddit, to see if anyone else has had the issue..
on 09-12-2023 18:56
I'm sure FB are fully aware so yet another app update is probably required.