Strange Behaviour (4.8.3)

Do behavior trees have a complexity limit? I only ask because one of the behavior trees I have recently be working on suddenly just refused to run, and I was slowly making new branches, and making sure each branch worked. Screenshot - d73c6b8e8c1fb6ed1e776029a15ca4d7 - Gyazo The behavior tree will light up the root node, but nothing beyond that. Even with just a single branch, the tree won’t execute. Moving the nodes into a new tree doesn’t help. However, only executing a single node (wait) does properly run. I just remade the entire tree manually, and that didn’t work.

EDIT = Didn’t have a valid node that could execute.