I had this happen to me today in the Nether, although my game didn't crash - I opened my shulker box, got some items out, crafted some torches and then when I closed the crafting interface the box was gone. I mined all around the area thinking I may have accidentally broken it but no sign of it at all. Logged out and back in with no change. Really gutted as I'd just looted a bastion remnant and found a Soul Speed III enchant book which was in the box...
N D Pettigrew
I had this happen to me today in the Nether, although my game didn't crash - I opened my shulker box, got some items out, crafted some torches and then when I closed the crafting interface the box was gone. I mined all around the area thinking I may have accidentally broken it but no sign of it at all. Logged out and back in with no change. Really gutted as I'd just looted a bastion remnant and found a Soul Speed III enchant book which was in the box...