Mobile Theme - Stock Search

In SageCRM v2022 R2 I have a container block that contains a Search Screen and a List Block that looks up Stock levels based on the a view that looks at the NewProduct and WarehouseHolding tables.

It works perfectly well through the desktop theme, but I've tried to add this to the standard CRM Mobile theme and whilst I can see the menu and access the search screen, the Find just doesn't return anything, I just get the endless spinning wheel of death.

What am I missing? Is there anything else that I need to do with the view/screen/list to make it work on a mobile device?

Any pointers much appreciated.

Cheers.