Okay, the units are being replaced with some sort of cinematic type characters.
Their GUID becomes this format: "ClientActor:3:1:1", "ClientActor:3:1:2" and "ClientActor:3:1:3"
They don't appear to respond to the "mouseover" unitID, but trigger UPDATE_MOUSEOVER_UNIT regardless.
They seem to be playing out scripts, rather than behaving like real units so maybe they aren't capable of being interacted with.
They trigger neither the normal mouseover lighting effect nor the new outline mode for mouseover, although they do show the outline if you target them and mouse off, except they show the outline color of whatever you last had targeted.
I'm guessing they're just bugged for now.
