Category and selector with same requirements give different results

[BalduinLetzer]

Using a requirement (like nJet3) in the selector to define the events after cf.ReduceEvents gives a different result, than when using no such requirement or a less stricter one and then building a category for that event (e.g. nJet1 in selector and then nJet3 in category).

This used nJet3 in the selector

This had no jet requirement in the selector but then used a category for nJet3

This happens when building the category as part of the selection using the selection result, but also when building the selection after ReduceEvents in a producer using the reduced events themselves.