It's possible the "blink once a second" could have been a side effect of the DIM setting which I probably had enabled. It probably does blink once a second depending on your setting. But when being targeted the LED will flash as it is receiving a lidar source. If the trigger on the gun is cycled you WILL see it on the LED. From the ALP update site it states:

"By enabling Pro Mode, when laser interference is detected LED will blink only while you are being targeted."