UDS_URL is not meant for links, Use UDS_TARGET_URL instead
The KIO documentation for UDS_URL says:
use UDS_TARGET_URL if you want "links" to unrelated urls.
So the use of UDS_URL here was probably wrong. Switching to UDS_TARGET_URL fixes mounting of some slaves such as baloosearch, which set UDS_URL to the URL of the entry itself for some reason.
BUG: 431079