I wanted to come back after putting more testing in, which is incredibly hard as getting into the server is near impossible right now.
I hadn't reset my computer, Voice Attack was left on over night without changing anything. It was probably 10 hours from the last time I had had Helldivers 2 open (unsuccessfully getting into the server after 3.5hrs waiting). I booted up this time and everything was working as intended until partway into the second mission.
Any stratagem requiring a double/triple direction press either WW, AA, SS, DD or <<, ^^, >>, vv if assigned to arrow keys would not register past the first press. I tried adding pauses between button presses and extending / rotating pauses and even included recording my inputs and the double/triple direction continued being an issue.
I figured out how to circumvent this by setting up a 2nd, or 3rd, command that VA would call to continue the Stratagem which seems to work for multiple missions, I'm currently testing on my 4th mission and it is still working.
I feel Game Guard is causing this to happen by reading something on the PC. I'll need to do more testing but it's hard to want to close out of the game, reboot, etc when the uncertainty of being able to get back into the game is so high.
*Edit*
I wanted to add some attachments. The first 3 show my way of circumventing the issue. Spear 1 does its inputs and then calls Spear 2, Spear 2 does its inputs and then calls Spear 3, which successfully finishes the Stratagem sequence.
The 4th picture is the longest Stratagem call and it works flawlessly without needing successive VA commands due to not having repeat inputs next to one another.