Mobile Form showing hidden fields.

I have a Form that in the browser is behaving correctly. i.e. it hides a field until a rule/task is activated and then shows the form field. However on the mobile device it behaves differently. On initial load the field appears. Other rules within the form behave correctly. I have deleted and re-created the rules as well as the form fields but each time it is the same. Can you please provide any assistance as to the cause?

Thanks

Kevin