Neo Coolcam Touch switch dual : left switch doesn't light on/off in the app

I have lots of touch switch dual that used to work fine with my former box (eedomus) but I have found a bug with Homey’s implementation.
Switching both switches from Homey works ok but if you press the LEFT switch its state is not shown in Homey. Neither on nor off. The switch and tge corresponding light are on or off but Homey doesn’t see that the left switch has been clicked.
The right switch works fine though ?!
It is impossible to use a flow with the left switch since it doesn’t reflect the actual state
Has anybody found a workaround ?

You can report a so called issue for the developer at Github.
You’ll find the link at the store app page