The input form does not work in mobile popup

Hello friends
I ran into a problem that I hope you can help me with.
The website I am building opens articles in a popup page. I want to add a comment section for articles.
But the problem is that in mobile phones, data entry form does not activate by touch (so I can’t enter information). And this problem does not exist in the computer.
so, It seems the form’s inputbox works with mouse click, but it does not work with a touch.
What could be the reason?
you can see the problem here:...

The input form does not work in mobile popup WordPress ...