Currently, there's a game breaking bug (for the inputs) on the build in Souldiers on GoG which forces the keyboard to constantly takes over the controller inputs.

Whenever any button on a controller gets released, the game enable keyboard inputs back automatically. This happens with both wireless and wired controllers AND keyboards. (I tried multiple version of controller: Wired Xbox360, Wireless XBox One, Wireless and wired PS3 & 4, etc.) Every time, I restarted the game to make sure everything was working outside of the game.

Even without ANY keyboard plugged/connected, the game still forcefully enable the keyboard constantly.

In-game, this shows as:
You press a button, there's a pop-up on the bottom left side of the screen that mention that the Controller is enabled. You release the button, it instantly mention "Keyboard enabled". Certain actions during the game requires you to SPAM the controller because the input gets ignored the first time (as the game switch input from the controller to the keyboard and back to the controller).