Mobile app IOS Split screen only partly working

Mobile app IOS Split screen only partly working

Using an IPad Air 2

It would be very useful when filling out some ZC forms to have information available from a different app in a split screen. For example contact information from Contacts, to use in the active ZC form. 
Although this works fine with most apps, for example the Contacts app can be open in one half  of the Ipad screen and Safari can be open in active window next to it, the ZC Mobile app does not appear to currently support this. It appears that both apps cannot be active at the same time. Any ideas on this? 
Thanks