Not sure if this is a bug in query conditions or not

I am wanting to put two conditions on a query to get inspections by caseid if the $_GET variable caseid has a value, but if a specific vehicle is requested via the $_GET variable vehicleid get the inspections for a specific vehicle no matter what the caseid is.
I built this in conditions: (see screenshot)

Screen Shot 2021-01-18 at 8.39.55 PM1518×432 35.5 KB

But when I click the “Ok” button to close the modal and then click the “Query Options” button to bring up the modal again, this is what is now looks like: (see screenshot)

Screen Shot 2021-01-18 at 8.40.29 PM1524×290 28 KB

As you can see it doesn’t preserve what I built but changes it. Is it letting me do something it’s not designed to do but when I click “Ok” it corrects it?