It could be, that the easy list you are using, or actually the Adblock that is using, wasn't updated, you can try adding it manually, and see if you get the same results. Weird though, in both cases, it should have been blocked if it was an actual advertisement and not just a picture. What other Adblock are you referring to?
Although this bug is still present in version 46.0.2597.46 (PGO)on Windows 10 64-bit,
deleting bookmarks (in folders) works when you go through menu>bookmarks.
in that new tab you can browse your favorite sites and delete them without killing opera.
As in the other thread, I can see that, it's fixed in the new version 45.
So the problem is solved?
For once, it were - but it's very complicated.
One day it works (now), other days it doesn't.
I don't know the error, but the VPN is very poor in my opinion.
Except, when it works.