Removed some attachments (small .txt and .jpg files) but they are not removed from the cloud (Nextcloud). Have experimented a bit, added new entries with attachments, then edited and removed some again. Attachments stay in the cloud, are not deleted. It creates a confusion, they get a random name (0b055dfb-2445-4c55-80d7-6ccb262528f9.enpassattach), so you don't know which file may be deleted.
Windows 11 Pro x64 | Enpass 6.8.4 (1166) | Sync via Nextcloud