I downloaded and installed the new firmware. It was totally unusable. I kept getting “unable to parse the file” errors and AI warnings that the LIDAR was useless and that other windows needed cleaning.
I rolled back to.14 all works agian.
Did you do it your way or the Bambu way ? 
Bambu would like you to perform a full hardware calibration after a firmware update, also a reboot of printer and restarting Handy/Studio…
And never forget that you agreed to their terms and conditions making clear that a software or firmware update might change or break things.
Funny enough in many cases a total do-over and installing all from scratch makes things work just fine - while no one really knows why or why it only really works while online and logged into your account.
I prefer to stick with the issues and problems I can get around instead of ‘staying up to date’ just to please the abuse and fake needs of Bambu.
If it works then just don’t break it…
I did it my way which is even more stringent than Bambu recommendations:-
Power off printer
Power on printer
Firmware update
Power off/on printer
Printer Reset
Printer Calibrate
Printer selftest
Printer Off/On
I know about the T&C. Just reporting the issues.
Ok, then welcome to the world of uninvited beta testers LOL
Seems clear now Bambu still has the focus on the wrong problems…
Which are of course not the ones the created for no reason other than control and bogus…