edit:
I’m pretty sure this is related to the precision of the values being plotted. There are values of ‘z’ that are near zero, but passed in as a float with an exponent of e-12 which seems to be causing the rendering issue.
This is sort of unrelated to the plotting issue above, more of a general browser issue now.
With the chrome update to V57, my 3D plots no longer show up because of webgl issues (hardware acceleration is blocked by my company’s IT) so the workaround i found is to include the HTML tag: <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> to enable plotting in IE11. I’m not sure if this is needed for other users, but it was necessary for me.