Sound bug on 2017 iMac

Got the game from GoG, and l’ve been enjoying the hell out of it. Mostly. Lately, after some time playing, the sound just cuts out. No sound at all. Can’t find any way in game to bring it back. Only solution is to quit and restart the game. But then the problem recurs. It’s not a hardware problem - I can Cmd-Tab to another app, Safari for example, and the sound there works just fine. Any ideas?

Had the same occasionally under Windows. I thought the turnbased mod is the reason. Do you use it?

I do. It did occur to me as the culprit, after I posted. I haven’t had a chance to test the theory yet. I’ll do that today.