Since a recent Steam update, when running Steam after a system reboot, my generic controllers are not recognized by Steam's input status and don't work in-game. The controllers are working normally as a Game Controller in Windows, and are detected in Steam controller settings. If I unplug / replug the controller then Steam will detect it correctly and it starts to work in Steam games.

Please let me know what could be causing the failure for Steam to recognize controllers until they are unplugged / replugged. I shouldn't need to replug my controller just for Steam to recognize it when the controller is already properly registered as a game controller in Windows.