Mutated Node

As far as how common.. in my experience and others I’d put it at 2-5% Some lines just carry the predisposition to do it. My blueberry has this issue and it pops up 20-40% of the time I’d guess

Wow. I've had ones happen to me lower down. 3 nodes on 1 set. But as this is high up. Lightly if you can when they both grow a simple spacer between the lower part of the stems.. near the base. Will push them apart allowing to grow them and they naturally push themselves apart.. Good luck

Not that uncommon, really but definitely nice surprise...

It happens kinda like when fiming