WebDAV registry backend Refresh can remove existing sources
Sometimes the members (WebDAV collection) of my collection accounts disappear. Then I click on “Refresh collection accounts” and they appear twice. The checked bit for “Copy book content locally for offline use” is lost. After a while, not necessary on the same day, the the webdav collections appear again only once. This effect is rare, but happened twice within two months. I do not know how to trigger singularization of the doubled CalDAV/CardDAV collections.