Unique items disappearing when storing in stash

Hi!

Two unique items that dropped disappeared when I tried to put them in my stash. Here is what I've done when it happened. This was not the first time, but I don't remember neither the item not when the first time happened (although it was this in this season)

In my last run on a Corrupted Forking River map, I had 2 Contract: Breaking the Unbreakable dropped in the map. After finishing the run, I identified the items by using Helena NPC in my hideout. I Frostblinked near the stash, opened it, and Ctrl+left clicked to store all items in quick succession, including my 2 unique contracts. I then closed the stash and opened it again (because I had forgotten to check the items). They weren't in the Unique items tab, nor in the heist locker.

It doesn't happen all the time, but it is my 3rd unique item gone, so, if you could take a look at why this happens, I'd be delighted. Thanks in advance

You'll need to investigate your stash tabs' affinities.

I've never known GGG's staff to perform that kind of check on a player's behalf.

Well, I went to check again with more patience this time and realized I made a fool of my self this time. Sorry for the inconvenience and thank you to Sarno for making me checking again. :D

Found the 2 contracts on the heist locker.

It happens. :)