We are using nRF Connect SDK 2.9.1, Zephyr. The hardware used is a nrf52840dk, rev2.
We have a proprietary protocol that is running concurrently with BLE and uses MPSL API for radio access.
We are now facing a problem when doing DFU over BLE using MCUmgr and BLE as the transport layer. We've followed the "FOTA updates on nRF52 Series" documentation to setup DFU over BLE. The target flash area to store the uploaded firmware to is the internal flash.
The problem we get is that either MPSL or the SoftDevice Controller asserts during transfer of the firmware. It is either "MPSL ASSERT 106,701" or "SoftDevice Controller ASSERT 48, 1403".
Any suggestion on what it can be that causes the asserts?