Phili PAN04

I have just installed HASSIO and a Philio PAN04. The automation works fine.
The PAN04 has 2 switch inputs (S1, S2) and 2 relay outputs N1 and N2.

Problem occurs when I manually switch on the S2 switch. That turns output 2 on as expected. However the frontend reports output 1 is ON and output 2 OFF which is not correct.
It is not possible via frontend to switch off output 1. The frontend switch goes back to ON
Only way is to manually switch off via S2

Any experienced this ?