@Smanar thanks for the update and your comments, (yes I startet long ago with BASIC on a C64 
)
In between got 4 devices running fine, surviving after a reboot of my Raspi.
@manup I recognize that the man icon shown in Phoscon is not always showing what Deconz is showing, means prompt reaction on Deconz, but no reaction of the icon, may a core issue as mentioned above?
At the moment i do more testing with the 4 devices and awaiting on the input of @manup.
And again many thanks for your input, I really appreciate that 