On Android submit button is not visible

2) The above embed code has been generated by your app. It works fine on Chrome on Desktop. However on my Android, the bottom is cut off and so I've had people fill out entire forms and at the end the submit button was not there. I can solve it by just increasing the height. Is this a known issue?

Hi,

Since you are using the iFrame embed code without the script that automatically resizes it, changing the height of the frame is the proper solution. 

<iframe id="JotFormIFrame" style="width: 100%; height: 2189px; border: none;" src="//form.jotformeu.com/form/52801691259358" frameborder="0" scrolling="no"></iframe>

You can also change the scrolling from "no" to "yes" to allow the form to scroll within the frame.  If you use the full iFrame code with the resize script, it should automatically adjust to suit the device.

http://www.jotform.com/help/148-Getting-the-Form-iFrame-Code