Hotbar shows several times the same item

Several weeks ago, I had a glitch with my hotbar on one of my creative maps. It began to show the same item several times (picture 1). I can select another item, but it is showed several times too (picture 2). However, I have only one item of each type in my inventory (picture 3). I have tried to save and quit, close the app and reload it, and I did all the updates, but nothing can resolve the bug. As I don't know what I did for that to happen, I can't say how to reproduce the bug.