It's a bit too easy to whiff 5H after using Parry by pressing L+H

I've been trying to learn how to parry but I feel like I'm getting punished for trying when going for L+H. It would be nice if Parry had a very short window where it ignores attack inputs after parrying successfully during slowdown with L+H. Parry has a pushback when successful so the 5H is just guaranteed lose turn or even a whiff punish.

I'm sure this isn't really an issue with Parry button, but L+H is just too easy to misinput.