Hi fellow captains,
as requested by Cryptic Support, I'm posting here on the bug concerning Very Rare Gorn Bridge Officer Candidates (the purple ones).
It doesn't matter whether you buy them of the Exchange or get them as reward from duty officer queues. The resulting Bridge officers are only of rare quality (blue)
As some players in the r/sto subreddit concluded, it must have something to do with the traits of the Bridge Officers. As "Bite" is only a normal trait, it ruins the mix for the rarity calculation - which is why a Gorn Brigde Officer can never be very rare.