Opera does not store deleted bookmarks. However, if your Opera account has old bookmarks on it, and you sign in with it on Opera Browser when you haven't in a while, the sync will add the old bookmarks from your Opera account to the browser.
@hucker I'm not sure if you can change the number of connections.
Having more than 4 connections to a server wasn't very common and since there aren't updates in about a decade....
You can try taking a look at those configuration files (in) to see if you find something.
Confirmed. This is bug DNA-104241. It's already fixed in Opera Beta 96.0.4693.12 though and in Opera Developer. Just have to wait for Opera Stable to hit 96 or sooner if Opera decides to backport the fix.
@burnout426 Thank you for your nice reply. Although this advice is not intended for the cause of the problem but for the elimination of the error afterwards. Next time I have the same problem, I will follow your advice and carry out your instructions. The problem, however, lies without a doubt on the side of the Opera browser! I hope in the future this inconvenience will not happen again and this bug will be fixed by Opera!
@helly I used to have the same issue while trying to sign in. What I would do is go to your settings and ensure that your VPN is off. After that I was able to sign in!
Hopefully that helps.