I have 21.0 installed on Odroid HC-4.
When I try to update to 21.1 or 21.1.1, it gets stuck on boot animation for hours.
I tried 21.0 → 21.1 and 21.0 → 21.1.1 with the same result. The updated system is not accessible via SSH.
Updating / downgrading back to 21.0 allows to boot.
Any idea how to resolve it?