Mouse Button 4 opens quit game dialogue

When trying to configure my Button 4 on my mouse as part of my controls setup, the options menu closed and I was asked if I want to quit the game. After further investigation I found that this happens when you press the button in any menu and in game, making the button non functional. I primarily use Button 5 anyway and only found this out after discovering MCPE-40876 but others may use this button and have an issue with it.