I'm actually experiencing this too and was about to make a post about it until I saw this. But something that's even more weird is that only one of the wikis I'm with will show up.

Me too! Really bugs my OCD. The names of wikis randomly phase in and out every time I check notifications.

Interesting. Based on my own list, it looks like it isn't even dependent on which wiki the notification is from. I have some notifications from Community Central that show the name and others that don't. This definitely seems like a glitch. I am sure Fandom will fix it after the long weekend.

Edit: 20 minutes later and it seems fixed for me already. So either Fandom was already on top of it or this is just some intermittent server glitch.

Edit 2: Okay, it is some sort of intermittent glitch. It seems to come and go for me.

Im Having The Same Problem, Also RIP Technoblade