RAK4630 power consumption in sleep mode over 900 ua

I'm developing firmware for a RAK4630 for IOT purposes. According to the datasheet, the average consumption of the nrf52840 is 1.5 ua in system ON mode. Mine is measuring over 900 ua which is oddly high for what I have already seen. The application is quite long (+5000 lines of code) so it would be hard to explain. So my question is:  how can i force the conditions used in the 1.5 ua experiment in my project in order to reduce its power consumption? 

Related