Hi
I'm having trouble submitting a form and then getting PowerApp to go return to a screen and show the correct data. Source is a Sharepoint List.
The main screen is a list of sites which has a groupby assigned to it.
GroupBy('Equipment Testing',"SiteName","GroupbySiteName"

The next screen (ItemSelection) is a list of equipment based at each site. This has a filter function.
Filter('Equipment Testing',Site=Gallery1.Selected.SiteName)

The next screen is a form which shows whatever is selected from the ItemSelection screen above. This is view only.

Then final screen is a copy of the above but editable with a submit button with the following code.
SubmitForm(EditForm);Navigate(ItemSelection)

However, upon submission, it returns to the ItemSelection screen but always shows data relating to Allanson Street site and not the site I am working on.
Why is it doing this and how do I get it to show the information (Items) I need. If I update an Item for Ashurst, I want it to go back to the ItemSelection screen and show Ashursts items, not Allanson Street.
Any help much appreciated.
Thanks