Hello,
My project:
- I have a low consumption project width BLE.
- I'm using internal LF clock (I know it's better to use an external)
- I use the Beacon example project as starting point.
No problem when using an external crystal or the LF clock from HF clock. So i think it's from the calibration.
The problem appears when i use the BLE with the LF calibration.

I got really high consumption between calibration starting and advertising starting. The duration is not the same because both are not sync.
It's like the calibration is stuck and the ble event unlock the situation.
I tried to disable the calibration, but i got errors in build time.
Same problem when I enable CONFIG_NRFX_CLOCK, unable to build :

Maybe I'm all wrong and it's not that, but it looks like the calibration need HF clock to be active and it's not until the ble advertising.
The best thing i want to do is to launch manually the calibration, that will be perfect.