Thank you @drewmccormack for reminding (always good ). Definitely is was interpreted like that. But why? And only onto a filled note?
Both the original note text as well as the pasted had both (for markdown with space and already tags w/o space). Tried all sorts of variations but reproducibly same result.
And yet the pasting works fine if applied to an empty note.
Can’t imagine how both actions they trigger a different algorithm …
Agree it is a bit odd that an empty note would behave differently. Perhaps it has something to do with what was already at the point where the text was pasted (?)