The blue waveform is generated with the purpose of triggering the anti-islanding protection of the inverter by using the overfrequency/underfrequency relay.
This delay you are saying I already tried. And it seems not to work, unless I use a different current controller from the ones I tested (PR and deadbeat controller) before.
About this waveform I sent previously, the blue is with this delay and the green is the one generated by the current controller using PR controller, note that this dead-zone is untrackable using this resonant controller. Anyway, I even don't know whether it can be done this way.