Yes I have had a couple and they will sometimes lose that 3rd after a couple of nodes. I have a plant growing now that did that and then grow one limb the same size as the main trunk horizontal while the main started growing normal. The huge horizontal limb contained to grow 3. At first I thought I had accidentally topped her but nope, she just weird. I had a couple others that were auto flower strains and required a lot of LST to prevent mold as they tended to be short squatty mini traffic cones. The yeild on those tend to be about 30% lower with fluffy buds. That's my recollection, I might get one out of every 20 plants or so that's been my experience. Not an easy plant to deal with.