Dear all experts, I am new to Airpods Pro. Just wondering is it normal when I try to charge the Airpods, the amber light on casing will disappear after maybe 5 seconds? It is still charging just that there is no light on the casing.

Even when it is fully charged, if I plug the charging cable in to the casing, the green light will only show up awhile and disappear after that.

I used Macbook too, the green or amber light will always be there whenever it is connected. But Airpods seems different.

Is this normal? Or it is a defect?