Reaper Bug

I use subprojects often in Reaper. Recently I've begun using two levels of subprojects more often than not. I do this so that I can duplicate my VST tracks without them blowing up Reaper. I've been burned that way more than once.
I've found that doing such crazy subprojecting can result in Reaper crashing. Such a crash happened the other night. When I relaunched Reaper, my first level of subprojects was showing blank events instead of rendered waves.

Fortunately I was able to work around this issue. Instead of double clicking the tracks to open their subprojects I manually opened the first level subproject. Just doing this seemed to resolve the trouble.