Display problems in Mobile using signature Data Type

I have a form that has uses tabs with the page layout. The blocks also have more than 1 columns in them. In one tab there is a signature field.
When using Chrome from the PC it work as expected, however when using Chrome on the Mobile (Iphone and Ipad) the layout is scrambled and the signature field is not displayed.
Changing to Safari on both then it works correctly.

I suspect a bug, bit perhaps there is something I need to change or update. I am using the latest version of SC.