Twitter Fabric Problem Overview
Fabric reports rare crashes which I generally cannot reproduce
Fabric identifies it as Batmobile (manufacturer) Defy Mini (device model) running Android 5.0.2 Motorola has a device named Defy Mini which was introduced in 2012 running Android 2.3.
Other answers report a fake device used to scan for viruses by Trend Micro https://stackoverflow.com/a/34942270/923557
Here is a report of an unreproducible error involving this specific device: https://groups.google.com/forum/#!topic/google-admob-ads-sdk/5KQ2SxazCjg
Can I ignore all crashes where this device is the only affected device?
Twitter Fabric Solutions
Solution 1 - Twitter Fabric
I received the same user from Sentry. I think you can ignore it. Probably it is a bot scanning your app.