I’ve been appointed as a mod 3 times now.
The action shows up in the modlog straight away, but it always takes a couple of hours until it actually works. Then, serveral hours later it seems to just reverse itself.
I suspect it has to do with ongoing federation issues on the side of lemmus.org (the instance of the head mod account). All post from lemmy.world are delayed by about 12 hours on that instance.
Maybe the delayed federation somehow messes with the mod appointments?
The apointment definitely worked for a while. I actually ended up in a strange state where I had “moderator view” on my tabs, but when I clicked on it it said “no posts, subscribe to a community”. But maybe that’s just due to browser cache, dunno. But the mod rights were removed again … 3 times!