Flexmod P3 auto shutdown

I have my flexmod p3 on during the night for some engraving when I wake up, part of the engraving has no marks suggesting that the laser is turn off mid way. The laser is not in low-power mode (just nothing output). Power cycle my machine spring the flexmod p3 back into action (showing lower power dot) and turning on the driver works again.

Is there an auto-shutdown feature of flexmod p3 that I am not aware of? What could have happened (a power blip overnight)?

There is error detection on the Flexmod P3. Is the red LED on the driver on?

Yes it was on for the driver when there was no output. After power cycling, I believe it was also on.