duplicate child node appearing and disappearing

[arieljake]

I have a simple tree that I am populating from JSON data, using <node>.appendChild().

When I expand the one of my nodes for the first time, even though the node only has one child, it renders the child twice. When I click the first child, the duplicate disappears and I get a javascript error:

Uncaught TypeError: Cannot read property 'internalId' of undefined.

I am also attaching the console dump of the tree node objects.

Any idea what I could be doing to cause the duplicate node to appear?

dupe tree items.jpg
console-dump.jpg

[mitchellsimoens]

I personally have not seen this happen.