The problem is caused by the fact device interfaces returned by
Solid (e.g. item->device().as<Solid::StorageAccess>()) are not
full objects, but only references/pointers to a per-device-object,
i.e. requesting the same interface for a device will return the same
address every time.
If the interface is used used in multiple places, calling disconnect
on the interface address disconnects the signals for all users.
BUG: 400992