I've tested it out on a few other keys, but for some reason using Shift + A makes the H key not work. Keys like J work fine when I use Shift + A before it. (just to clarify I'm talking about pressing the keys in order but holding them down until the last key is pressed)
I can also do things like Shift + D then H and it works fine. It's just Shift + A + H.
Just used a simple "if event.key == K_h:"