Hey.
I use a ZQSD keyboard layout. Whenever I enter Workshop mode (hold F) I lose control of the Z (forward) and Q (sideways left) keys. I can use S (backwards) and D (sideways right) but that's it. Changing it to WASD did allow me to use the "A" key to go left but the W didn't do a thing.
The weirdest part is, that while pressing Z does nothing, pressing Q gives the prompt "You cannot assign a person to this supply line etc. etc. etc..".
I'm really puzzled what is happening here. I noticed my controls moved from ZQSD to WASD with the Donkey Kong game in the beginning too.