See this plunker for example off issue
You notice the chart does not load and there is a displayUnit calculation error.
Up the timeout at the bottom of the script.js file to 500ms or greater and everything seems to work fine.
Since the data is not changing, just the time until execution, I would guess this is a ZoomCharts bug?
Not causing me major issues, and I can work around it, just wanted to report as I saw in another issue there were some issues with .time function in latest release.