I wanted to pop in on this thread and let you know that LEM 5.7 RC3 (just released yesterday) has a focused effort to eliminate these "endless reports" issues (with side effects of improving performance in related scenarios where they might not be technically endless but might as well be).
If any of you are able to upgrade and report back on your experience, that'd be awesome. We're hoping to confirm that in customer environments things are tracking the right direction before we release in a few weeks. Thanks!!