Hi,
I created a custom form on Sharepoint through Power Apps. All worked well until recently.
Current situation
Modern view - when I select 'New' (to add new list item) I get only a blank screen.

When I click on existing list items no data is presented.
When I click 'customize forms' in Power Apps everything is fine

When I change the experience to 'Classic' the standard form DOES present the fields but not in the layout I need. And when I change the form settings to 'default Sharepoint form' again the data is presented but not in the layout.
So is it possible a link between Power Apps & my form as been corrupt? it worked fine with all existing fields until recently. And I've restored previous versions of the Power Apps form but still no success.
A list of changes I made which may have caused the error
1) change one permissions group to allow override of advanced permissions
2) created list duplicates (is it possible duplicate entries corrupted the form?)
3) I tried to reconfigure a link between OnSelect & a field I named 'status' - this failed so I restored a previous version
I am really desperate to fix this so please any help is very much appreciated.
Many thanks,
Carol