I just upgraded to the latest QNAP firmware. Everything seems to be working, but despite the promised patch of Safari-related problems some glitches still remain.
First of all the bug in Plex media server remains, in that it won’t start after first boot after firmware upgrade, but needs a second reboot of the NAS. I’m not sure if this is fixed in the more recent Plex upgrades, since my last attempt to upgrade Plex just caused more problems than it solved and I then chose to downgrade. So, as long as nothing more than a scone reboot is needed I will live with it.
Second, while I’m not sure what Safari problems have been resolved, mine still remains, that I can’t log in at all if using Safari on an iPad. Login menu appears, enter user and password, and nothing happens other than the spinning “wait…” screen. But the apps works so it’s also manageable.