Comment # 7 on bug 1201439 from Dirk Weber

Currently I do not know of a way to verify or check the keymapping in grub.

But I also installed these updates on two machines with encrypted partitions
yesterday. One is a virtual machine with BIOS, the other is a PC with UEFI. 

Both booted without problems after the update.

Also no file under /boot got a new timestamp during the upgrade.
Therefore I do not have an idea what else could be the problem.
I think it looks like a specific problem on your machine.

Are you using secure boot?