The calculation results of business rules using UDA are not as expected.

I've written the following business rules to handle cases where a UDA is assigned and cases where it's not, but as you can see in the attached image, the results are not what I expected for some members, and I'm having trouble with this.

I would appreciate it if anyone who can think of a possible cause could let me know.

------------------
SET UPDATECALC OFF;
SET CACHE ALL;
SET CACHE HIGH;
SET LOCKBLOCK HIGH;
SET AGGMISSG ON;

FIX("V001","DC001","BR00001","Training1-1","PL001","S001","FY26","Apr","C001")

FIX(@CHILDREN ("B001") AND @UDA ("Entity","ENY01800"))
/If this member is a child member of B001 and UDA is ENY01800, then input a value into C.