The power consumption of the nRF52840 during advertising

BLE settings:

1) Advertising interval: 500 ms.

2) I am not explicitly turning on the DC-DC regulator; I am using the default settings.

3) Tx payload: 31 bytes.

According to the online power profile simulator for my settings, the average current should be 30 µA. However, the actual power profile reading is 60 µA.

What can be done to reduce the current?