Find Usages and Refactorings in Chained Module Suites

Unfortunately I just experienced that "Find Usages" and other refactorings do not work accross
chained module suites. E.g. if I invoke "Find Usages" on a method of a class from a base suite's
module (accross all open projects), the usages in modules of subsuites are *not* listed even if they
are open.

Is this a problem with my setup and actually intended to work correctly? Otherwise this is a real
showstopper for using chained module suites, in my eyes.

Frank-Michael