I know there have been several threads about the purple notification dot next do "Forum replies" in the community dropdown menu not disappearing. But I think the problem I'm having now is a different one, and I couldn't find any discussion about it in the forums yet.

Right now I have a permanent purple notification dot in the header bar itself, between the Support and profile menus (but seemingly belonging to the profile menu). None of the dropdown menus have a notification dot, so I'm not even sure what it's trying to notify me about. I have no unread forum replies, no new chat messages, nor anything else I could think of that could explain that dot. I visited pretty much every personal and community page on GOG and still couldn't find out, or get it to disappear.

Is anyone else having the same problem, or has had it before?

It's a forum bug that used to be temporary but has now become permanent:-
https://www.gog.com/forum/general/heres_how_to_remove_permanent_forum_reply_notification/page1

As the link said, try pressing F12 and then in the browser console, paste this line and press ENTER:-

angular.element(document.body).injector().get('menuNotificationsRepository').deleteAllNotifications();

Thanks! That's a thread I didn't find in my search… it would be very helpful if GOG's forum search allowed us to sort by date of last reply.
The fix worked! That's some peace of mind back :)

My congratulations! You are infected from now on, the very next reply will get another Purple Gem of GOGness, have fun!
I'm having fun since 25th of March 2021.

it is a hidden camera watching you constantly

It did! But now it's actually in the correct place (next to the Community label, and next to Forum replies). So, at least it's different… yay, I guess?
I assume a user script auto-running the code from above could help.

Or, to quote a user from the thread AB2012 linked above:
"Praise the dot, accept it into your heart and you will be enlightened. Stop resisting. Glory to the dot."

It's a feature. Welcome to the club.

It's gone! It's gone! The wicked purple dot is gone!

I hear the next Star Wars won't feature a Sith as the main villain, but GOG's purple dot.

I've come to love the Purple Dot,
For I am mortal and it is not.
The Purple Dot shall always be
Once no one 'members You or Me,
So learn to love Forever Dot,
The one eternal thing you've got.