Hi @BrendanZ1 ,
Based on the issue that you mentioned, I think your thought is right. If you put the ClearCollect formula within the OnVisible property of the screen, whenever you navigate back from another screen, the ClearCollect formula would be executed again, so your coljobstatus collection would be reset.
I agree with your thought, I think a global variable could achieve your needs. Please consider take a try with the following workaround:
Set the OnChange property of the Dropdown box to following:
Set(SelectedItem, Dropdown1.Selected.Value)
Set the Default property of the Dropdown box to following:
SelectedItem
Please consider take a try with above solution, then check if the issue is solved.
Best regards,