So I've had a weird problem for like a week now.

I'll have a 'disconnecting' symbol flashing on and off beside my name, though friends have watched me move around and they don't notice me rubberbanding, and I never actually disconnect.

Sometimes things will fail to load. Like, I did Bismarck and he was invisible, but I was still able to stand on him, see his corona, attack it, etc.

Also I desync from Eorzea time. It gets worse the longer I stay connected. Eventually it desyncs so badly that to me it will be night, but to other players it will be day.

Not really sure what the issue here is. I got my modem replaced just today and it didn't help, tried things like Pingzapper, tried turning off firewalls, setting FFXIV as a program to ignore for my antivirus, etc.