Nohboard doesn't work in game after alt-tab

[Wntx555]

I am trying to use Nohboard for recording but it doesn't work for me. Whenever I alt-tab for a game (running in windowed mode), the Nohboard, which is set in the background or minimized, doesn't follow the key input. While I'm using a browser, the Nohboard works fine and I can capture it through OBS and see it in my stream. But when I switch to a game, it just doesn't follow any input I make. I don't quite understand what the problem is.