Hey, I don't know if you check this anymore, but I don't know a better way to get a hold of you. I've noticed that there is a bug in both the demo and steam version for me, where when I click, it doesn't always register. This is most noticeable with the pistol, where I'm often frantically clicking. I've also noticed this bug with another unreal game, trepang2, so I believe that this isn't something on my end. Unfortunately, this makes the game pretty unplayable. Have you received any other complaints based on this?
I still come here. This version is certainly outdated but yeah, never got that bug or heard anyone with it so it certainly isn't fixed if it's there.
Does the game run stable, and is it the only bug you got? How about in the menus?
I really have no idea what it might be, that aspect of the game is very basic to mess it up, and like you said, another UE4 game gives you the same problem (although another smaller indie title so it may be an issue caused by dev inexperience).
I will research about it for sure but I can't guarantee that it will be fixed as I have no way of testing it if it's fixed or not, and have very few leads to go on in to what may be causing the issue.
In the meantime ask for a refund, if I find what it is I will message you here.