UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36

Steps to reproduce the problem:
You can use a sniffer to see the connections or have an app with a single endpoint to see the requests. I'm don't know if there is a way to see the pre-fetch request on Chrome.

1. Open de Developer Tools
2. Simulate an Iphone
3. Type a URL but don't hit enter
4. See on the sniffer or your app that the request done
5. Check that the user-agent doesnt't have Iphone or mobile agent
6. Hit enter
7. See that the second one is using the user-agent with Iphone

What is the expected behavior?
I expect the two request are made using the same Headers. I have found inconsistency in my apps.

What went wrong?
I use my initial request to cache de device on session. First is Desktop and then is Mobile.

Did this work before? N/A 

Chrome version: 64.0.3282.167  Channel: n/a
OS Version: OS X 10.11.6
Flash Version: