Wordpress Inline Comment Form disappears on mobile

I'm working with the plugin Inline Comments on my Wordpress blog. Unfortunately the comment form disappears on all mobile phones as soon as you click into the text area. Any ideas on why this is happening? Could it have anything to do with the keyboard appearing on the mobile screen?

I would be very grateful for your insights.

Here's the Link to my page: http://538359-2.web1.fh-htwchur.ch/brauchen-wir-body-positivity/

Unfortunately you have to make an account to be able to comment :/

Tell me if you need more information.

Best wishes – Arthur