This is a prime example of how trees and shrubs should NOT be grown/pruned/trained. So many branches growing from the same point (even competing leaders at that) is just a recipe for disaster. There's so much weight and force being applied to one single point by the heavier growing branches that it'll eventually give.
The wood seems to have slowly been tearing because of the tension and the tree has been trying to heal it.
This will need constant attention in the form of bracing and keeping an eye on it.
Or start over with another shrub/tree and choose one that's trained properly for longevity.
