This week a new preview feature was added called "Relational data, option sets, and other new features for CDS".
This was turned on by default in an already-existing app.
With it turned on, it breaks my app because it effectively removes access to the 'Owner' column in all my entities.
I'm using this column to filter results to display only what the user owns.
I have been unable to find a new way to do this in the powerapps blogs. Does anyone have any information on how to query entity record ownership with this new feature?
here is the link for the updates you are looking for
hope this help