I'm on a PI4, where the latest impish kernel is linux-image-5.13.0-1009-raspi 5.13.0-1009.10 and I saw the bug there. I reverted to kernel linux-image-5.11.0-1021-raspi 5.11.0-1021.22 and was able to mount my encrypted datasets again.
The kernel versioning seems to be different in the pi4 tree, and I don't see 5.13.0-20.20 there.
I'm on a PI4, where the latest impish kernel is linux-image- 5.13.0- 1009-raspi 5.13.0-1009.10 and I saw the bug there. I reverted to kernel linux-image- 5.11.0- 1021-raspi 5.11.0-1021.22 and was able to mount my encrypted datasets again.
The kernel versioning seems to be different in the pi4 tree, and I don't see 5.13.0-20.20 there.