Yes I tried pressing S and 4 at the same time and it works fine, it only happens when I press S plus another random key, and then 4. It's so annoying because if this was something like the J key it wouldn't even be noticeable but of course it had to be one of the 4 keys you use all the time in...
Also I found out that if I combine the S key with any key not just A and then I press 4 it doesnt work. What's strange is all of the other numbers are registering. Very weird.
I checked and it's still an issue. I held down W and Q and then I pressed 4 and it worked. But then I held down S and A and then I pressed 4 and the 4 key did not light up.
So recently I got a new Red Dragon k503 Keyboard and up until this point it has worked perfectly. However a couple of hours ago I noticed while playing a game that if I held down the S key, the A key, and the 4 on the top of my keyboard all at the same time then the S and A register but the 4...