When the program is running, it’s impossible to use anything else as it steals focus constantly. I’m on Arch Linux 6.1.58-1-lts, and it happens in the fluxbox window manager (with no desktop environment).
It does not happen with KDE Plasma, but Plasma is heavy on my GPU so I don’t plan on using it alongside PNGTuber Plus, OBS, and whatever I might record or stream.
Edit: I might upgrade to a better GPU soon though, but it’s still an existing issue. (edit 2: i forgot a word lol)