Resp HTML5 Azure Blue displays pages in different ways on Android (FM2019)

I've modified the Azure Blue template slightly to fit our purposes when publishing our documentation as responsive HTML5 on the web. It works as expected on desktop and laptop computers.

But on Android phones I have a problem that pages look different depending on if I come via the TOC/menu frame, or if I access the html page directly.

For example, on Android, when accessing an html page directly, images are displayed very small. Also some paragraph/character formats are displayed too small to read.

But if I follow the "Click here to see this page in full context", I come to the main TOC/menu frame, and the same html page is now displayed as desired - i.e. both the previously too small images and too small text are now properly sized.

How can I get the same, proper size also when accessing the html page directly?

Edit: I now realize it's only text inside tables that becomes too small.