Github user sravan-s commented on the issue:
https://github.com/apache/zeppelin/pull/2168
@Leemoonsoo , the bug is limited only for 'stacked' version of bar chart.
Notice the radio button inside the chart
* This is the grouped version

* This is the buggy stacked version, in some cases, it won't even get
rendered

* This is the fixed stacked version

p.s. I tried recording gifs, but my laptop hangs(ubuntu 16.04, but I think
it's the hardware that's the culprit)
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