Edit functions is grayed out in Confluence Cloud for certain users

Issue Summary

Edit functionality is disabled for certain users for certain customers

Environment

New Editor 

Steps to Reproduce

The issue is currently not reproducible. If you are seeing this bug, please comment and let us know if you are also seeing it in Incognito mode. Additionally:

*Please help us reproduce it*:

URLs to test on https://websocketstest.com
If the network does not support/allow wss connections, the "WebSockets (Port 443, SSL)" section will be blank.

Expected Results

Edit functionality should we visible in Confluence for all users

Actual Results

Edit functionality header grayed out for certain customers

Workaround - Known Issue

A customer reporting this issue discovered that their websocket connections was blocked by their proxy set by their IT department. A workaround is to use Firefox with a manual proxy when editing in Confluence.