Happens for any files copied from Finder.app (default Mac OS app, like explorer.exe on Windows)
If I enable my Imgur plugin, it manages to capture image and upload it. That’s why I said I am sure it is possible to paste image with clipboard from Finder.app. Attaching more detailed gif below.
First I try to copy-baste 3 files using buffer, but Obsidian only pastes file names (subject of this bug)
Then I activate my plugin and it manages to upload the image (This proofs that it is possible to get data from buffer copied from Finder.app)
3rd scenario: I disable my plugin (revert default Obsidian behavior) and demonstrate that on drag-and-drop event Obsidian adds files to the note as expected. The same is expected from copy-paste, but on Mac copy-paste leads to plain text file names pasted without any actual files pasted (again, subject of this topic)