(scenes) strange behavior : lights turn off when switching scene

Hi all, i’ve got a sonoff USB zigbee dongle + ZHA, and i’ve paired many bulb (hue and innr) with no problem.

i create scene in a room with 4 lights that are grouped in ZHA.
one scene is all the bulbs red 20 %
second scene is all the bulbs orange 60%
third scene is all the bulbs white 100%

when i switch scene for the second to the first, the lights goes off … i have to turn off the scene and then turn on again to make it work !

any ideas ?

i will make a video to demonstrate the problem if necessary !