Yeah, I'm following that as well. I see you commented that it happens on Chrome browser as well, but I must say, testing my own game on the Alcatel A5 LED with Remote Preview, seems to work just fine. The problem (for me) is indeed limited to the webview.
Thanks again for getting to the bottom of this, and no worries about this beta, I'll rollback my project to 136 today and export a new APK with it.