I don't know if this issue happens to everyone, but I know it happens to me and a few others. There has been no new update since the last one that introduced the bug.
Someone mentioned it could have something to do with one of those ridiculous achievements for dying the first time. Maybe it has a to be connected with gog galaxy. Who knows.
Thank you for taking the time to respond, Brewtal_Legend.
That's unfortunate. I tried to track down the developers, as sometimes issues like this can be solved by appealing directly to a game's creator or team, but the Wolfbrew website is offline and I didn't see any indication that they currently have an online presence.
It looks like Dethpool tested the game with Galaxy back in August 2016 without any luck. I was wondering if anyone having this problem has downloaded the version of the game packed with Galaxy. Theoretically, the two installers would be largely identical and act the same way, but as you said, who knows. :/
It's really too bad this hasn't been dealt with (or at least acknowledged). I'm sorry you and others aren't able to enjoy the game.