You sure it's from the game and not your keyboard? You could try checking your keyboard for ghosting here: https://drakeirving.github.io/MultiKeyDisplay/
Try the same combination, and see if all the pressed keys light up.

I had similar issues before (pretty sure it was from the same combination as you, W + Ctrl 2), and after confirming it was from my keyboard, I bought an anti-ghosting keyboard, and it was solved.