Just checked over on the Steam forums and looks like the bug is being caused by the latest patch and an issue with the latest NVIDEA display drivers. Current solution is to roll the drivers back.

Here's a link where you can see for yourself and check for updates

https://steamcommunity.com/app/644830/discussions/0/1696095260996501688/

If you haven't encountered this bug, to quote Lovberboy you're "One of the Lucky Ones!"