This bug is hard to explain but it only happened because of these 3 causes, 1 by placing down a sign, 2 open up chats menu and type in a command, and 3 the command and structure blocks inventory themselves basically what happens when i do one of these 3 things it won't allow me to switch block in the hud slots and when trying to do this it accidentally places down the block selected in the hud slots and when I try to save and exit button it either won't allow me to press the save and exit button or it instead press the feedback button just above and when trying to press the back button in the menu it won't allow me to. Same goes when trying to press the menu button and the chat button i have to keep pressing the buttons over and over again until it lets press it and when it lets me press it such as chats after typing in a command I won't allow me to press the enter button i have to do the same as I do with the other buttons. This same issue also occurs when I enter the structure or command block inventory. The only way I can get rid of this bug is to exit the game completely but I have to do this every time this bug occurs which is very annoying. I really hope this bug can be fixed. I very well will be pleased.