Same problem with current consumption in stop mode using B-L072Z-LRWAN1

Question isn't new, but I couldn't find the answer in existing threads.

The stop current on the Discovery Kit loaded with End_Node project is above 3 mA. The low power mode is enabled; jumpers in correct positions; software version 1.1.5

Getting same results on our custom board.

Can anyone provide an explanation what to look for in the source code? Also it will be helpful to get a simple binary doing nothing: disabling TCXO; and putting CPU in the Stop mode.