List.interscation

when run two list and have the number of index and i want get interaction i get extra element in result

Change the lacing of the set intersection node from longest to Auto.

i get only one item but i need the rest of list without any sub list flatten not working it return same value i also used filter by bool mask i get the same value i want to merge all values return from set intersection in one list

i solved by using if statement thanks