OH2 Networkbinding: Eventlog Client ON in CLI smarthome:status NULL

I have for a few weeks the effect that the clients are ON in the eventlog but if I check in PaperUI and basicui the clients are unknown. I also checked in the CLI with smarthome:status and the clients are there also NULL.

2016-12-30 17:14:14.817 [ItemStateEvent ] - Mobile_Frank updated to ON
openhab> smarthome:status Mobile_Frank

Anyone an idea what’s going wrong?
Version is beta 5, also tested different snapshots… older versions like beta 3 now problem, but I don’t want to go back…