Just can't loop animated particles.
Yeah I had that problem too, so I switched to the beam version of Scroll, which has some advantages and some deficits compared to the scripted version (which is actually particular user-unfriendly if you have no clue about scripting like me).
So here are my results so far. I made 2 versions of the effect - a normal one for the Saths that depart, and a failed one for those who used their subspace weapon longer for some reason and fell/stayed behind. I also added some high-powered glow maps. I'm still working on the subspace beams as I'm not happy with their look yet, but I managed to change their warmup time in a way that they are not that much overlapping anymore, and the range is now matching the "ring" of the subspace rift.