I am posting this here to see if I should open a bug report about it. I am running Kubuntu 20.10 with Joplin 1.7.11
When I bring up the external editor (emacs) from Joplin, make some changes, write it and click stop monitoring in Joplin, the changes do not not show in the note. The temp edit file appears in ~/.config/joplin-desktop and then disappears when I click on stop watching but the real md file (in Dropbox/Apps/Joplin) doesn't get updated with my changes.
Let me know if I should open a bug report with logs and other info.