I have this issue too but a bit worse - sometimes things can triple up in my hot bar and so far it has started and not stopped, making me have a very limited amount of space in my hot bar when really I have many slots but they are out of order. In this screenshot, you can see that the only slot in my hot bar that does not double or triple up with another one is the very first, where my diamond sword is. It is very annoying and I hope to see this fixed as soon as possible! Sometimes this has happened in other versions and it has always been fixed after a while, but not as extreme as this one and this is the most irritating it's even been especially since I am trying to build a lot at the moment!
What? This is not resolved on my iPad?