App OnStart i create a collection
ClearCollect(collect_workflowworkitem,Blank());
ForAll(EntityworkflowWorkitemData As d365entity,
Collect(collect_workflowworkitem,
{
FullNameOriginator: LookUp(PersonUsers, ID = d365entity.'User (Originator)','Person name'),
Status:d365entity.Status,
'User (Originator)':d365entity.'User (Originator)',
Subject:d365entity.Subject,
'Work item instructions':d365entity.'Work item instructions',
WorkflowWorkItemClaimed:d365entity.WorkflowWorkItemClaimed,
'User (UserId)':d365entity.'User (UserId)',
'Due date time':d365entity.'Due date time'
}
)
);
The collection is not populated when I run app, however, in Collections headers are formed

The data source is staging table (also known as Entity) from Dynamics365 fin ops. Where isn't the data loading? Will it take longer times to load even when App's OnStart has been called.
Please note the app starts running and the gallery control having collect_workflowworkitem as the data source shows no data
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