When I'm playing PTW on my PC, I can't use hotkeys that involve the use of Ctrl and Shift and the same time.
Shift - something works well.
Ctrl - something works well.
But somehow, Ctrl - Shift - something doesn't work at all.
In example : Ctrl - Shift - M (clean map) doesn't work, as well as some worker action and others that I don't remember at the time (all ctrl-shift-something)

Any clue?
Thanks. :)

BumperRrRr !

I kinda doubt this is gonna help, but some keyboards have problems when multiple keys are pressed, mainly older keyboards. Have you tried a different keyboard?