Nc16: Disturbing messages

Nextcloud 16.0.0 running on Synology DSM 6.2.

All clients (web, linux, android) repeatedly get disturbing notifications that “some of your link shares have been removed”.

No indication what link shares are involved.

Also, if the link shares have been removed, why are there still notifications?

Also got the same message. My one link share now gives the message “This directory is unavailable” and I’m not able to open it or view any of the files via web or WebDav. Any chance these are related?