Safari 14 production version on MacOS reloads Lovelace UI when attempting to perform any real action. You can browse the UI, but whenever you actually want to flip a switch or similar the entire page just reloads. If you attempt one more try, Safari gives the error “A problem repeatedly occured with” and the URL (ser.ver.ip/lovelace/default_view).
Not related to Lovelace theme - same happens if I default back to the default blue theme. Problem started occuring once the new Safari 14 for MacOS was downloaded. Quitting and restarting Safari does not help.
It does work with the iOS 14 version of Safari on the iPhone though. It also works fine with Chrome, so the issue seems to be with Safari on MacOS. The iOS HA app works fine.
I am seeing the same problem too. I wonder what Apple messed up with this release. Would be good for us to report it to them so it gets fixed. I’ve switched to Firefox for now…