Help track down a leaking instance

[Moreus]

You not gonna find in tree if is orphans.
i found similar problem, you can use GDScript or make CSharp version

Finding orphan nodes

This post includes an example that uses an autoload singleton. Basically if you have nodes that you are worried about being orphaned, they need to inherit from a script class that can listen to a signal queue_free() them. I’m not aware of any other blanket method like that. Otherwise I might recommend looking at why your nodes are being orphaned in the first place, and putting in logic to free them instead. Memory leaks suck!