From 1 year ago I have installed in may home five FGS-223 controlling all light and ALL of them are having the same issue.
Randomly they don't react to physical switch request. It means I manually turn off or on the light and the status is not changed (and no noise form the relay).
Sometimes second attempt is working fine but few time I need to switch tree times...
All are working as:
Switch Type 2 - toggle switch (device changes status when switch