I’ve not used verycrypt, only normal Linux LUKS device mapper encryption, ZFS encryption and windows bitlocker full disk encryption with a paraphrase entered on boot (no tpm). But I haven’t had this problem with any of those.

I’d suggest either your SSD just loses data on power off which is a problem with some SSDs or it’s some veracrypt specific issue that I wouldn’t be familiar with.

Id encourage you to try out one of the above options.