There is a bug in Sunlit 2.0, which supports Micropub.
which causes HTML posts published via Micropub to be changed (usually in bad ways) when "editing" the post, even when you don't actually make any changes to the post. I discovered this issue when publishing viaI published two stories:
Because Sunlit doesn't yet support syndication via Micropub, I clicked "edit" on one of the posts, and toggled on syndication to Twitter and Facebook, and then clicked "save." The result was that the post's content was changed (in a destructive way, resulting in visual regressions), even though I hadn't actually edited the content, or even clicked into the content editor.
Seems like this is a bug.