Can't boot LUKS encrypted install after 2023-03-31 stable update

Well, there was also the grub update. pls check if it changed any settings on your end. At least you might need this in /etc/default/grub:

GRUB_PRELOAD_MODULES="cryptodisk part_gpt part_msdos"

# Uncomment to enable booting from LUKS encrypted devices
GRUB_ENABLE_CRYPTODISK=y
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