Same, sometimes getting "Lost lobby connection", "Booted from server" or "Connection to Server Timed Out" when changing characters or zones (includes teleporting to trials or dungeons through dungeon finder).
If the troubleshooting in this article is unable to help with this issue, then please open a ticket with us at help.elderscrollsonline.com for additional assistance/investigation.
Same thing - I'm really tired of this. Since months there is constant problem with this. Problem always starts end ends after maintances - sometimes there is everything ok for weeks and then boom - after some random maintence it happens again. Official solution is reading troubleshooting (it doesn't work) or take a ticket just to get the same advice. They know it but not admit that they have serious problems with game.