Anybody here with wall mounted iPad?

I have a wall mounted iPad Mini 4 constantly connected to openHAB.
Sleep mode is deactivated so that the iPad is constantly ON.
Does anybody also experience that sometimes you have to tap twice in order to get the desired result? It seems to me that after a couple of hours I have this fault. However, it is not reproducible.
I tried with another iPad Mini but with the same result.

I have a iPad Pro wall mounted.
Can‘t confirm what you are saying. First touch triggers the function.

But my iPad isn‘t awake all the time. The iPad display turns on as soon as I walk in front of it (motion sensor).

Thanks Dirk.
Yes, my problem is probably related to wakening up the device allthough I cannot reproduce it.
What motion sensor and solution do you use?

I described my solution here: