Newly added cells not showing up without page refresh

We deployed a new Zeppelin build and noticed that we have to refresh notebook pages to get newly added cells to show up. Note that it works fine when adding a cell at the very top (before and after the first cell thus). It doesn't work after a cell already ran before the update.

Adding a cell also throws js error :

vendor.096f989dd7de73d2.js:29 Uncaught TypeError: Cannot read property 'ownerDocument' of undefined
at Function.b.contains (vendor.096f989dd7de73d2.js:29)
at HTMLDocument.e.focusParagraphOnClick (notebook.controller.js:9)
b.contains @ vendor.096f989dd7de73d2.js:29
e.focusParagraphOnClick @ notebook.controller.js:9
________________

vendor.096f989dd7de73d2.js:34 TypeError: Cannot read property 'focus' of null
at paragraph.controller.js:9
at o.$broadcast (vendor.096f989dd7de73d2.js:34)
at notebook.controller.js:9
at vendor.096f989dd7de73d2.js:34
at f (vendor.096f989dd7de73d2.js:34)
at vendor.096f989dd7de73d2.js:34
(anonymous) @ vendor.096f989dd7de73d2.js:34
(anonymous) @ vendor.096f989dd7de73d2.js:34
$broadcast @ vendor.096f989dd7de73d2.js:34
(anonymous) @ notebook.controller.js:9
(anonymous) @ vendor.096f989dd7de73d2.js:34
f @ vendor.096f989dd7de73d2.js:34
(anonymous) @ vendor.096f989dd7de73d2.js:34