HI @laadams ,
Do you want your ComboBox to search based on two fields in your SP list?
Based on that you mentioned, I have made a test on my side, and don't have the issue that you mentioned. The screenshot as below:
The GIF screenshot as below:
Please consider re-add a ComboBox control within your app, then set the Items property to your SP list data source.
Within right Data panel, set the Primary text field to ColumnA, Set the Secondary text to ColumnB. Go to the SearchFields field, type the following formula:
["ColumnA", "ColumnB"]
In additon, please consider save your SP list data source into a Collection firstly, then use the Collection as data source within your ComboBox.
Set the OnStart property of the App control to following:
ClearCollect(RecordsCollection, 'YourSPList')
Set the Items property of the ComboBox to following:
RecordsCollection
then re-configure your ComboBox to search based on your two columns, check if the issue is solved.
Best regards,