Hello. I have just written a message using Flow.
Accidentally, I opened a link on the same tab, and consequently my entire message was lost!!
Even after I clicked the "back" button on my browser, I couldn't see the message I had written.
This happened even though the option Warn me when I leave an edit page with unsaved changes on my preferences IS checked!
To avoid such cases, users should be prompted if they write a message and try to leave the page without saving. I hope this talk page is the right place for this request.