This is a bug as you're unable to change the default. It's been a know issue since AT LEAST January 2019. It really needs to be pushed to your programmers. If you auto default something from a chosen FILTER & then remove that filter there should be NO DEFAULT. If you claim it defaults there would be an option to make another choice as the default.

As I said - THIS IS A PROGRAMMING ISSUE. Please send this to your upline to fix!!!

Super FRUSTRATED WITH QBO!

:(