Lvl complete pack (lv. 50)

My lvl 40 chest has completely vanished from all my inventory. This was after I had gotten it from opening the lvl 30 chest. I was trying to shift/ctrl+ right click it into storage via pet, and then it just poofed out of existence. I have no clue if it’ll somehow magically show back up in my inventory once I hit lvl 40. Please get back to me lovely devs!