https://devzone.nordicsemi.com/f/nordic-q-a/117091/ble-on-nrf52833-crashes-on-bt-rx-wq-threadWe are using an nrf52833 with the nrf21540 FEM and are getting a fault. Even with a basic BLE example, we are getting this fault. When we use a board that does not utiliize a FEM, we do not get this fault. The fault is happening on the &quot;BT RX WQ&quot; threaden-USTelligent Community 13Fri, 13 Dec 2024 14:05:59 GMThttps://devzone.nordicsemi.com/thread/514913?ContentTypeID=1Fri, 13 Dec 2024 14:05:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ad187d00-5c11-4100-ab0d-fa939662d866eb12345<p>Turns out if the HFCLK is not working, it will crash when you turn on BLE.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/514068?ContentTypeID=1Mon, 09 Dec 2024 14:46:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4c2ce57c-11c1-4bfd-9155-fac083bd1534Einar Thorsrud<p>Hi,</p> <p>I see that the MPSL assert handler is called. Do you have logging enabled? If so, you should get a line with assert information printed. If you can share that, I can check which assert this was in the MPSL implementation.</p><div style="clear:both;"></div>