Arduino MKR1000 wont start without USB connection

I’m working with Arduino MKR1000 Wifi with Zerynth - all good so far. Unfortunately downloaded Projects only starting while connected via USB (an host).
Only with external power the Project code newer starts.
This looks like an Bug from Aug 2017:“Application only present when Photon connected to Zerynth host”, described in this forum…

Any Ideas to solve

Thank you, Volkmar

Hi @Volkmar_Hinz
We are sorry that you are experiencing this issue with Zerynth, We will check this behavior on the MKR1000 board and let you know the updates.