Hello,

I wanted to report a bug we are having where we are unable to add more than one _(DB.Null) as a parameter to a Stored Procedure or Table lookup. You can save it once, but when coming back into the Lookup Rules on the modern designer, the system removes _(DB.Null) from the list.

If you fully delete the lookup rule and recreate, it will save and work, it is just anytime you open the page for any sort of adjustments you will have to fully recreate your mappings.