Hi @Flexi ,
What is the data source of your form?
What is the data type of Dropdown's item? Can you share some expressions of it?
I have made some test with look up field and option set field, and don't have the issue you mentioned.
Maybe the complex field is not properly connected, you can try to remove your connection and add it again to check if the issue is fixed.
Watch Microsoft Business Applications Summit sessions on-demand.
Features releasing from April 2020 through September 2020