key blinding of THE BIG MAP with mouse side botton

Hey DICE, there has been a bug that has not been fixed since BETA TEST. When binding the big map button to the keyboard side button, the keyboard button can be turned on and off normally. However, when binding the big map to the mouse side button, pressing the mouse side button can open the big map, but pressing the mouse side button again cannot close it. I think this is a BUG with the button binding. It used to affect gameplay a lot.In Battle Royale, frequent opening of the big map is needed, which further affects my original desire to play Battle Royale.So please fix it.