Hi! The release is r136.
For you to replicate is very simple:
-Open the base "kiwistory" project
-Set the Orientation to "Landscape,
-Insert the facebook instant game plugin,
-Export it as facebook instant game
-Upload it as an facebook app with instant game configuration,
-Play it on a iphone devices (my devices is a iphone 8 with IOS 12.1.4), but this issue appears almost in all iphone devices
The issue will appear randomly so you'll have to close and open the game several times.
Thanks for your interest :)