The last few times I've swept maps for random SE's (just after my ruby medal tick), I've not seen ANY Shroud Jabberwocks on ANY of their spawn maps. After a couple of times of zero finds, I began to wonder if the SE was in fact still spawning or whether I was just having horrendous luck with them - so I started watching the SE Kill logs a little more closely (note the emphasis on little there)
Subsequently, I've done at least 2 more sweeps for them (and other SE's of course) and still not seen hide nor hair of it, either on the maps or in the kill logs.
Has this SE been withdrawn ? (the only forum threads search reveals are from 2012) or am I just having the lousiest luck with this specific SE ?