I've hit what I think is a thin related issue on upgrading to bullseye/testing. My boot hangs on fsck timing out on the 3 thin provisioned partitions. I manually did a vgchange -ay to active them but it didn't solve the problem. If I drop into maintenance mode and manually "mount -a" things do mount and I can exit and continue the boot.
I'm not sure the best way to further diagnose this and see if it's really related. -- Alex Bennée KVM/QEMU Hacker for Linaro
