i have discovered a workaround that works for my clients.
the ‘flip to landscape mode’ works if they view the document with the mobile chrome browser
instead of the coda mobile app.
so, when i select the ‘Add to Home Screen’ option in the mobile browser,
the resulting icon on the home screen will open the doc and allow the landscape mode.
so this bug only appears inside the coda mobile app and not the android chrome browser
this trick has the added advantage of placing a nice icon on your mobile home-screen for the document;
like a real app
max