Hi Valentine,
(like this one,
I found in my hands this bend starting from the knot called "square antiprism" in the diagram in this post
http://igkt.net/sm/index.php?topic=4655.msg30093#msg30093 ,and transforming it into a bend through the same process as a Blimp knot can be transformed into a Zeppelin bend.
It was done to note to me that can be obtained four variations of this bend("long" + "short" on the model of the Double Harness bend if the tails are not crossed, and over/under + under/over if the tails are crossed, if I understand correctly(EDIT: I actually have not figured out which is the fourth version, because, due to the symmetry type of the knot, the versions over/under and under/over seem to produce two symmetrical knots)).
Regarding the tendency to jam, at least for the simpler variation, or, better said, the more "spontaneous" version("long"), that you show, I agree with you, but I think it also depends on how the knot is set (if it is modeled by giving it the most compact form that may have,in fact can be very difficult to untie even after being loaded blandly),and of course on the type of rope which is used.
Personally, I noticed a similarity of this bend with the Hugo bend, but in fact it also resembles the Double Harness bend with opposite ends (if you want, just swap the direction "up / down" whereby the terminal parts of the two initial bights pass through his own standing parts, keeping the rest of the knot unchanged, and you get in this way the Double Harness bend).
Bye!