This is the reason I never made a mobile version and all mobile users use it in a browser.
The biggest problem (bug) with this approach is that iOS limits the RAM usage to 2 GB per website. I have to tell many of my users to ditch their $1000 iPads and get a used $150 Macbook for better experience.
I think Apple does it on purpose https://bugs.webkit.org/show_bug.cgi?id=268816