pinephone-charging leds

[lssjbrolly]

According to this (apparently resolved issue): #55 (comment)
the pinephone-charging.img is supposed blink the led to indicate the charge. However, I'm not getting any led. If I try to turn on my phone, or plug it into a charger (without the flashed sd card), the led will come on (a little green, yellow, and red). However, when I plug in the sd card, and then plug it into a charger the led does not light up at all, but according to the above linked issue it should blink different colors depending upon what the charge is:
"It blinks red if the battery is <5%, it blinks yellow when it's between 5 and 50% and it blinks green when it's above 50%"
Is there a way to determine if this is my phone specifically, or if I'm doing something wrong?