Same here. Since update to 01.07.00.00 my X1C is possessed.
During every single print it fails to pull filament at least once. My last print was a 10minutes single material print and my X1C reloaded the filament 3 times and during the last reload it failed to pull the filament. Why did it even need to reload the same filament 3 times during one print?
Timelapse videos are also broken. From a 14h print he made a 1 second timelapse!
I just updated to 01.07.01.00 and restarted ma last print. It did heat up the nozzle, purge the filament, cleaned the nozzle and then instantly purged filament one more time. At least no random filament reloads during a single material print.
Looks like I paid 2.000€ to be a firmware beta tester for bambu. Not happy at all.