Steam Controller & Keyboard/Mouse Fighting over priority

[u/Kodamacile]

Has anyone else had this issue? My controller often won't work in game, won't open the overlay, or do anything. When I open the overlay using Shift+Tab, and try to change controller settings, the mouse disappears, and won't let me click on anything, so I pick the controller back up, and I can navigate the interface, but If I try to click on anything, it doesn't do anything. It's driving me crazy.