No worries on double post.

If the flash is very brief to the point of being nearly imperceptible, the meter might have already woken up and is just not appearing in your scan list for some reason. Can you verify the kind of phone you’re using? And check the bluetooth is on? Some iOS users reported having to reboot their phones to get the meter to appear the first time.

You made me realize I should change in firmware is there should be a clearer distinction in the blink pattern of standby vs. hibernate mode.