Crash on Chrome 51/52 (MacOSX)

Here is a simple Panotour export with little planet intro and some spots.
Moving during the littleplanet intro or quickly around spots can crash Chrome browser 51 and 52 (beta) on MacOSX.
It seems that spots are distorted on the cartesians coordinates and also the view refresh is broken on rotation.

Demo : http://www.kolor.com/private_ptp2/crash/crash.html

Added littleplanet to force the bug but it can also appears with autorotation and with nothing.

Seems linked to the "set(view.fisheye, 1.0);" which is transformed into "set(view.fisheye, 0.0);".
Is it possible to confirm ?

EDIT aftyer many test this seems linked to the use of a BLENDING parameter to the first scene BLEND(1.0, easeInCubic) !

Works well until Chrome 50 but not on Chrome 51 and 52.