I've added a view form to a printable screen that's connected to a SP list and the Item property of the form being a global variable for the item I want to print.
The form has a lot of combo boxes because many of the SP list columns are choices.
In the performance section of the App checker I see these warnings for each of the combo boxes:

In my case, the form is just for viewing so I can eliminate these warnings by simply setting the combo box IsSearchable property to false. After all, nobody is ever going to interact with the combo box as the form is only for viewing/printing.
But it's left me wondering why this warning exists. The Items property of each combo box is Choices(@['List Name'].'Choice Column'), the combo box is set to single with ["Value"] as the DisplayFields property and the SearchFields property.
There is no property on any of these combo boxes that references anything on another screen, so why is this being generated?