Items in my inventory become inoperable.

Sometimes am item in my inventory become inoperable. I cannot move the item to the hotbar or to another inventory. It’s recognized as ingredients for crafting, but I cannot create the desired item.

The cause of the problem is unknown. It has happened several times before, but it always returns to normal. I think it was when I put a large amount of the same item in my inventory.

This time, the problem could not be solved no matter what I did in the app, so I cleared the cache and restarted the device, and the problem was solved.