Power issue on ESP double deck module

On this  module power it for development/debugging from your computer USB on the lower board can lead to an very dimmed red LED.

To avoid this issue add power on the upper board also. Looks like RED led consume some power and if you have an low current USB like I have, you will not see the RED led.

Indeed red part of LED is consuming more power and is not as bright as BLUE or GREEN but is fine for development purpose.