Buffer depot can not be directly loaded with Inserter?
Playing Krastorio 2 , Uranium processing produces 25% iron ore and 50% stone . Would be great if I could load a buffer depot with inserters , other wise drones end up picking up iron ore and stone from my supply depots and over loading the buffer depot

Thats not how a buffer depot works, just put it in a supply depot

I do put it in a supply depot , Also i set up a buffer depots right beside iron ore and stone depot ( by product of uranium processing . I have read your channel log , says request depots wont take from supply depot if same items is offered by a buffer depot and that does not work . Iron ore request depot still pick up ore from a supply depot rather than buffer depot .

Yea the logic has changed now, so they take from the closest whether it is a buffer depot or a supply depot