One more possible data point for this...a
band-aid fix for this has been per-use to go in to their preferences and
disable the "Resource View Modal" (just search in the preferences for "modal" and you'll find it).
But, I happened to have to go do something else on my second monitor and left an RS "viewer" page up on the screen, and I noticed that, every 5-6 seconds (I timed several...I'm not pulling those numbers out of my head or anything) there appears to be a "pulse" that I think is triggering the browser window to refresh itself and I think that might be the culprit for the window-closing thing. I again couldn't find anything related in the config file or anything, but I'm thinking if we can determine what's triggering that "pulse", then the problems will be solved. Since our RS is on a new server, I'm inclined to think that maybe it's some sort of PHP setting or something, but I'm not sure...