No matter what, I have no clue how to further diagnose this issue. And
given that I already had unsolvable issues with dm-crypt a couple of
months ago with my old machine where the system simply hang itself or
went OOM when the swap was encrypted and just a few kilobytes needed to
be swapped out, I am not so sure anymore I can trust dm-crypt with a
full disk encryption to the point where I feel "safe"... as-in, nothing
bad will happen or the system won't suddenly hang itself due to it. Or
if a bug is introduced, that it will actually be possible to diagnose it
and help fix it or that it will even be eventually fixed. Which is
really
a pity, since I would really have liked to help solve this. With the
swap issue, I did git bisects, tests, narrowed it down to kernel
versions
when said bug was introduced... but in the end, the bug is still present
as far as I know. :(