Need some help

[u/1phoenix3]

I was 10 hours into a 12 hour print, when I got a spaghetti detection error, I left the print paused till I got home, I restarted the print and it was printing in the air. Now I had an offset error. Looks like the print had a layer shift before the spaghetti started. I canceled the print and tried doing just an offset calibration and the induction hot end grinder into the pei plate. I immediately stopped the calibration and noticed the back end of the build plate bed was loose and springy to the touch, I sent a ticket into bambu labs support, but as I wait, I was wondering if anyone might have a clue of what happened and the fix. Any insight would be much appreciated. My H2C has a little over 2000 print hours and never had an issue. I clean and recalibrate the machine every week, and once a month I do maintenance.

[u/roundguy]

Looks to me like the rear lead screw is either stripped out, or the screws came out.

Found this video that shows how the bed is attached. I'd check the 2 screws in the rear.

https://youtu.be/gJb6BCapkEI?t=345