Somehow I'm not surprised. A few days ago[0] I was writing a Jira ticket after hitting the "Create" button and I wrote the description (the body of the ticket) for ~30 minutes. I switched the ticket type from A to B (no epics involved) and it wiped out the entire description. All I did was select a different item in a select drop down box provided by the form's UI. There was no warning it would clear the description…
Atlassian’s WYSIWYG editors are some of the buggiest bits of UI I’ve ever had the misfortune of using. Writing anything in Jira or Confluence is an exercise in misery. Even basic stuff like hyperlinks often go wrong.
As far as confluence, or just about every web tool I've used that has text areas (slack, etc) - I really wish that would be handled over to the browser.