List prefilter doesn't filter joined merged data in list view

[Jaanus]

Hi,
I noticed that if prefilters are set for list's joined data then the prefilter works for "each row separately" and also for form/details view, but doesn't affect the joined data in list view when joined data is merged down or merged and reduced.

As it works for form/details (where the joined data is merged and reduced anyway) I think it should be possible to make the prefilters filter also the joined merged data in list view?

 

[startpoint]

I know that this thread is very old, but I can't find something that help me.
Any solution for this situation?