As above - not sure what else to add. I can see this was reported on PC about a month ago but had no response - what am I missing here please?
#unable to unlock playing card voucher
paper crystal
whole hawk
Been reported a couple of times before, and these 2 seem to be the main "solutions":
In seeded/challenge runs:
*statistics are still tracked (such as jokers used, consumables used, highest round, etc you get the point)
*but you can't unlock any new items
This can sometimes result in the statistics showing that you should've unlocked something (like your Illusion voucher for example), but because some of those stats aren't actually counted you're not there yet.
Some people have also reported never having played seeded/challenge runs, but locked vouchers unlocking after they restart the game/complete another run.
Not sure which one of those is the truth, maybe even both.