Issue Summary

Some users will hit into issues when editing Confluence page. The error you will see will be  the "Can't save changes" next to Publish button and message "Something went wrong after loading the editor" message.

Steps to Reproduce

1. Navigate to a Confluence page that is already open (this does not happen to newly created pages)
2. Click on edit on the page 
3. The page will go into draft mode with URL like https://<instance>.atlassian.net/wiki/spaces/<space>/pages/edit/<id>?draftId=<id>&draftShareId=<random>
4. You will see the following message pop up "Something went wrong after loading the editor. Copy your unsaved changes and refresh the page to keep editing." on the top right of the screen.
5. You will also see the error message "Can't save changes" next to the "Publish" Button
    

Expected Results

Should be able to save the page normally

Actual Results

The below exception is thrown in the browser debug log at console tab 

...Synchrony: Warning: reconnect (websocket closed) synchrony:17:23
warn {:message out-chan terminated remotely} log.cljc:24:59
Synchrony: Warning: Channel disconnected by server. Attempting to reconnect. synchrony:17:23
Synchrony: Warning: reconnect (websocket closed) ...

Workaround

Cloning the page using the option "Copy" at the Page menu should allow edit of the cloned page moving forward. This will be based on the latest published version and not the draft version.