User deleted folder in a shared folder irrevocably
fairkom.net:443 62.116.55.48 - PqzsyNotLbnYE3A [05/Apr/2019:09:37:25 +0200] "MOVE /nextcloud/public.php/webdav/Tiny%20House%20Gemeinschaft%20-%20Konzepte%2C%20Kontakte%2C%20Termine HTTP/1.1" 412 1410 "-" "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36"
fairkom.net:443 62.116.55.48 - PqzsyNotLbnYE3A [05/Apr/2019:09:38:53 +0200] "MOVE /nextcloud/public.php/webdav/Tiny%20House%20Gemeinschaft%20-%20Konzepte%2C%20Kontakte%2C%20Termine HTTP/1.1" 412 1410 "-" "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36"
fairkom.net:443 62.116.55.48 - PqzsyNotLbnYE3A [05/Apr/2019:09:39:30 +0200] "DELETE /nextcloud/public.php/webdav/Tiny%20House%20Gemeinschaft%20-%20Konzepte%2C%20Kontakte%2C%20Termine HTTP/1.1" 204 1033 "-" "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36"
fairkom.net:443 62.116.55.48 - PqzsyNotLbnYE3A [05/Apr/2019:09:39:30 +0200] "DELETE /nextcloud/public.php/webdav/08_2018_Visionsbilder%20und%20Bed%C3%BCrfnisse HTTP/1.1" 204 1033 "-" "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36"
According to nextcloud docs, the deleted files should reside both in the user's and owner's trash bins.
However, if the file space is less than 50%, the oldest files in the trashbin get deleted. It seems, that this happened, as the used space (after deletion) is near 42%.