Deleted Cryotank and 2 Pale Roots

My IGN Is taubenss

I was painting my new cryotank I just bought off /ah, when I went to paint it, the shift click that I did made the item dissappear. I thought this was just a GUI issue where it appears missing and could be fixed with a simple relog (such as putting a shulker box in the same place where a block has just been placed) but when i relogged, the cryotank wasn’t in my inventory.