Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/2110
Tested and it fixes the problem.
However, since the change #2092, visualization is re-created everytime when
switching. I'd suggest find a way restore `ng-show` and address problem
ZEPPELIN-2148 in different way. So we can leverage activate() deactivate()
function. Otherwise it is bit annoying especially with visualization that takes
long time to create/initialize.
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