The expression jobstream.event always should use the event coming from the period

Current Situation

When having the expression mystream.myevent in an in conditon the event coming from the period and not the event coming from the instance is evaluated. But not when mystream is the actual stream. In this case the event coming from the instance is evaluated.

Desired Behavior

When having the expression mystream.myevent in an in conditon always the event coming from the period and not the event coming from the instance should be evaluated even when mystream is the actual stream.