The third concatenating field attribute rule does not apply when selecting and editing multiple features simultaneously.

Additional Information

Workaround

Add additional concatenating attribute rules as shown below:

var FullAddNum = $feature.FullAddNum; 

var FullStNm = $feature.FullStNm

return Concatenate([FullAddNum, FullStNm], ' ');

st_name, the field being edited is not in the rule's list of triggering fields, so the rule never triggers. Adding st_name to the triggering fields list resolves the issue.

Steps to Reproduce