Thanks for the report. WorkingHours should not forget the WebDAV configuration after an ordinary connection failure or timeout.
Could you please check whether a specific sync error, particularly “401 Unauthorized” or “403 Forbidden”, appears before the settings are lost? Also, can you reproduce it by configuring WebDAV while connected to your LAN, closing the app, disconnecting from the LAN/VPN, and reopening it?
When it happens, does the Cloud Sync option change to “Disabled”, or does it still show “WebDAV” but ask for the URL and credentials again? These details will help identify whether the sync setting itself or the credentials stored in the iOS Keychain are being lost.
