Editing pages on certain versions on Chrome browser fails with Websocket error

Issue Summary

Some users face issues when editing pages on Chrome browser. The root cause was an issue in Chrome version 77.0.3865.90 (see https://bugs.chromium.org/p/chromium/issues/detail?id=1006243) that caused WebSocket failures after a page have been open in edit mode for a while.

Environment

Affects only certain Chrome browser versions

Steps to Reproduce

1. Open Confluence in Chrome Browser version  77.0.3865.90
2. Attempt to edit any page 
3. Leave at edit mode for a while

Expected Results

Edit should continue as per normal

Actual Results

You will unable to proceed with editting the page and you may seen error similar to below at the console logs of the browser. 

"WebSocket connection to 'wss:xxxxx' failed: Unknown reason

Workaround

We can confirm that the latest browser version do not face this issue, so please go ahead and update the browser to a more current version.