Thank you. Both pings do work.
I think it is more a problem of the new IOS app. When I want to connect the bulb, the Connection is not correct.
I do the steps until i have to connect directly to the bulb:
The Wifi Props say connected but in the Upper View there is no Wifi Symbol, just the mobil cell (4G).
A bit Later the Bulb is connected and I go back to the YeeApp. The Progress is at 25%, and the connection is failed.
But why does a Update of the iphone app crash the old connections which worked for months?
It is very disappointing.