Confluence mobile version serves up login screen even when the anonymous access is enabled

Summary

When accessing Confluence from a mobile device on iOS 10 and Safari, the application serves up a login screen that is invalid. This is true for all pages, even with anonymous access enabled.

Steps to Reproduce

1. Install Confluence 5.10.4 (this can also be replicated in previous versions of Confluence such as 5.9.10)
2. Enable anonymous access
3. Make sure the system add-on called the 'Confluence Mobile Plugin' is enabled
4. Access the Confluence instance using iOS 10 and the vanilla Safari browser that comes included
5. Notice you will get an invalid login prompt asking you to login to Confluence

Expected Results

Confluence mobile should open up Confluence without asking you to log in.

Actual Results

A prompt comes up in Confluence asking all users to log in every few seconds.

Notes

This prompt only happens in Safari that comes bundled with iOS 10.
Switching to Desktop version does not correct the situation in Cloud, and is not a workaround. Nor is disabling Confluence Mobile.
Tested in iOS 9 and it is not a problem there.

Workaround

• Install the Confluence Server iOS app and use that instead - requires Confluence 6.8 or later
• Or install Google Chrome or Firefox instead on the device and use that.
• Or disable Confluence Mobile by disabling the system add-on called the 'Confluence Mobile Plugin' . Please note CONF-40782 - "Disabling the Confluence Mobile Plugin also disables the Workbox - Host Plugin in Confluence 5.9.X" when performing this workaround.