Hi, Which device are you testing? I'm wondering the GPU has been black listed. you can try below steps to enable GPU, but remember there will be some stability issues on some devices.
Please try below steps:
1. Add a text file called "xwalk-command-line" (no suffix) to the "assets/" directory of your Android apk package
2. This file should contain a single line, representing the xwalk command line to run; in this case, the line would be:
3. Rebuild and test again.