@ubi-karl Thank you for your reply. It's gone after I reload the save game, the next time it happenes I will try and reset the volumes. I'm sure I never had this problem before Season 3, but I think it occured maybe 3 times in about 80-100 hours of playtime.

I sometimes have the problem of never ending ticking sounds that production buildings make. When I zoom in, sometimes the sound does not stop until I end the game. I can leave the island, leave the region, even end the game and go to the menu. It only stops when I completely close the game. Anyone else experienced this?