I have just tried to reproduce this issue and I wasn’t able to reproduce it.
Server data is saved after a success connection and user data is saved after a success login.
If it is just a server reboot and nothing like hostname, SSL certificate, user name or password change, then I don’t see any reason why the iOS client is unable to reconnect to the server.
@bassano Could you please provide more details about how to reproduce this issue?
after changing the upstart-delay-durations from the lxc-containers (one each, nextcloud, turn, spreed) the problem was fixed ! so it seems the the containers come up in another sequence and everything works smoothly
before that the change the duration was on zero, so the sequence wasnt clear …