@lucasmz have a look at
https://unix.stackexchange.com/questions/684104/bit-rot-within-luks-encryption it might explain a bit about bitflipping in luks. I have experiences bitrot/tampering of the LUKS header, and now make a backup of the header.

Bit Rot within LUKS Encryption
How does bit rot affect a LUKS container and the filesystem inside?
Suppose you have a filesystem that is well suited to deal with bit rot. Now put it inside a LUKS container. In case bit rot corru...
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