HDX Hostscan keeps running

I have a HDX 2x400gb with all the firmware and hardware updates. Lately it always start hostscan and this does not finish. The HDX runs quite warm. I have to shut down and power on again for it to stop, but then after a while it runs again.

In the network and on the server nothing changed, music has not changed as well.

Hope someone can help me before going to the dealer.