VeraCrypt with PIM/keyfile seems to be ignored
thanks guys for confirming.

I did some commit history tests and found out that this (admittedly very huge) commit has fixed the PIM feature:

we should definitely add some notes to docs/changes.txt for this.

great troubleshooting (even if there were some misunderstandings/pebcak involved, that's not the problem at all). We found out when and what fixed the PIM, that's what matters (and emphasizing it in the changelog, TODO)
Thanks guys