I am looking into this and have a few theories but really cannot reproduce it and therefore fixing it is becoming quite difficult. Do you find it is with a particular device or have you tried another Android device? If it is device specific that would possibly help (is it a resource issue etc).
For anyone continuing to experience the crashing, I would like to suggest updating to the beta WebView channel. To do this, you need to join the community and then switch beta on for WebView. This is all outlined at the following link: https://plus.google.com/+MattGaunt/posts/71X8tBLToLY
Please let me know if updating resolves the issue.