Bump: I know that this is a very specific problem but I've just spent more than 12 hours nonstop on this and can't believe that no one else seems to have encountered this error, it's mindboggling.
Anyways, another question: I'm committed to using Ejecta and right now, clay.io as well. If I switched from clay.io Leaderboards to another system this system would need to let me submit scores with both custom name and custom score values WITHOUT asking the user for a login. So far, neither google play nor apple game center integration seems to supply this option, both require a logged in user and only submit a custom score value. For that reason, I'm pretty much stuck with clay.io at the moment and would REALLY love to make Ejecta&clay.io like each other
TL;DR I need a combination of Letterbox Scaling, WebGL and a Leaderboard Plugin with custom names and timestamped scores and export possibilites for both Android and iOS. This seems to be impossible as I have encountered bugs in each direction for the past few days.