Adding Documents tab to Company tab group for mobile devices

Hi,

I tried to add Documents tab to Company tab group for mobile devices. I used Firefox to access the mobile Sage CRM 2018. I can see the newly added Documents tab on Company tab group. However. when I clicked on the Documents tab link on mobile devices, I was taken to Company Summary screen instead of Documents list screen.

When adding the Documents tab to Company tab group, I selected "Mobile Devices (IPhone, Blackberry, Nokia, etc...)" from Devices dropdown box, and selected LibraryList as System Act.

Is Documents tab even supported for mobile theme? Thanks a lot!