I replicated the example from Cascading Dropdown on my SP Dev site. Created a Locations list with Location and Dept.
Leaving Powerapps and Publishing I then try to create a New Item in my list. I select the location and the Dept list populates with the correct Depts for that location. Testing in PowerApps works too btw.
What happens next has me stumped though. When I save it I'm only getting the Location in my list but not the Dept.
Any help/suggestions would be greatly appreciated.