@aargh,
Would you mind trying to disable your Autofill provider in Android settings and then test again and see if you get the same behavior? While the steps to find these settings will vary by device, you should be able to search in your Android settings for Autofill and find the right setting.
Please set the Autofill service to None, close/relaunch the browser, then try testing the behavior again and tell me if the browser still crashes.