Carter W1 empty itself quick

[patallen]

Hi, my carter W1 with new rebuild kit empty itself after 1 day. There is no external apparent leakage like it used to before from the large brass plug under it.
Where the fuel goes ? could it leak from the idle jet down into the intake ?

Fuel filter stays relatively filled so gas doesnt return to the tank. It cant anyway i know.

Thanks for any inputs !!