I have created a very simple 2 layout program.
Layout 1 displays some text, then a button below that (that takes user to layout 2 on being pressed), then a jpg graphic below that.
Layout 2 displays some text then 3 buttons below the text.
I have exported and Ftp'd across to my web hosting provider.
Testing through a desktop browser all looks fine.
Testing on my HTC phone running Android 4.4.2
Layout 1 just shows text and jpg image.
If I then select the browser page select (currently open pages) so that the layout reduces in size, the jpg disappears and the button appears.
If I then bring the page back to normal size I can click on the button, this takes me to layout 2.
Layout 2 then shows the text but no buttons, same action as above and buttons appear.
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Further investigation reveals that the buttons are there they are just not displaying. I.e. if I touch that area of screen I can see a blue rectangle appear briefly.