Here is a suggestion ticket about this:

opera.atlassian.net/servicedesk/customer/portal/9/BS-63728

Here is a suggestion in the official issue tracker about this

https://opera.atlassian.net/servicedesk/customer/portal/9/BS-63721

@xeldee One issue per topic please.

Unfortunately, this bug is still not fixed and I already filed a bug report months ago. Is there anyone else having the same issue?

I'm new to opera, I've never been to facebook (don't have an account) but like everyone else messenger keeps adding itself back to my sidebar. Not expecting a fix just adding to the list of people who are having this happen, will be switching browsers if it keeps happening.

+1, pls do it

@ceico I have not had issues with it reappearing lately. Last one or two updates of Opera seem to have left my settings as is.

It would be great to add discord to the sidebar, please add it

@darthagnon Any difference if you disable hardware acceleration?