Bump.
"2. Single frames of certain animations appear as black squares."
This is still an issue apparently.
I've tried 10, 11, 12 and 14 of the embedded Crosswalk runtime.
Minimum Android API 19 and Target of 21.
I'm testing on a Samsung Glaxy Note 3 with Android 5.0.
I can't duplicate the issue at will, it appears to happen randomly.
Anyone else see this or figure out why it happens?