Using the mouse scroll wheel, I can zoom out, but not back in. I have to do a hard close on the game, as I can't even enter doors whilst zoomed out. Is there another key I can use to reset the view, or a .cfg file change please?

Also ran into this issue and had to quit/restart the game manually. Any other players found a workaround or fix?

Yeah I ran into this issue as well and couldn't do a thing other than have the OS close the game.

I'm surprised the developer never fixed it. It's pretty easy to trigger the problem if they want to debug and it can't be that hard for them to detect the game entered such a state.