It's happening for me whenever I try to view a topic, or enter ib.
The only time it doesn't is if the address is 'https://www.fakku.net/forums/incoherent-babbling'
If I try to get in there, it'll be: 'https://www.fakku.net/viewtopic.php?p=4272939#4272939'
or something, and it'll not work, unless it looks like this: 'https://www.fakku.net/forums/incoherent-babbling/emma-watson-is-a-fucking-feminist'
Same thread, different titles.
Picture proof:
So, looks like it's related to the areas using their names to get there, but the notifications are using 'view topic' which it doesn't like