Having the same problem. Found it when I ran out of a certain building. A workaround I used was to open the inventory and selecting a random item, then deselecting ('Q' will work again) Here's a save with the bug "activated", pressing 'Q' will not clear the hand. https://drive.google.com/f...

As a disclaimer, I am a rather new casual player, on my 3rd playthrough, first ones took about 60 and 40 hours at a leisurely pace, using the default settings. Now I am trying out a railworld map, so far I enjoy it. I too welcome the rail planner and beam changes. And I dislike the thought of changi...