Hello.
We tried to reproduce the behavior locally, but without any results - what we get is the same result as in jsfiddle example. The only difference was that images couldn't be loaded because the URLs are no longer valid.
One thing that appeared was that multiple nodes has same ID - "0", but that shouldn't impact that.
Have you tried to remove all images, does that change something?
Could you please provide width of chart area in your application?
Also have you tried to create a blank page with chart only (remove it from your application wrapper)?
Thanks.