https://devzone.nordicsemi.com/f/nordic-q-a/127987/mpsl-assert-5-817I attempted to conduct Bluetooth development using the nRF52840DK (NCS 3.2.0), but I encountered an MPSL error: ASSERTION FAIL [0] @ WEST_TOPDIR/nrf/subsys/mpsl/init/mpsl_init.c:321 MPSL ASSERT: 5, 817 [04:08:55.662,658] &lt;err&gt; os: ***** HARD FAULTen-USTelligent Community 13Mon, 04 May 2026 07:44:31 GMThttps://devzone.nordicsemi.com/thread/565804?ContentTypeID=1Mon, 04 May 2026 07:44:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:60b5ce91-cd07-4c09-8626-e43e93e44627Hung Bui<p>Hi Shiyv,&nbsp;<br />I just want to quickly check if your issue is the same as what&nbsp;Xinqin reported in ticket #355735 ? I can see that you are from the same university and reporting the same error code.&nbsp;<br /><br />My suggestion for this issue is to try to make a minimized/simplified code that can reproduce the issue. And you will need to give us a clear description of what exactly the application does. We had a little bit of a problem in ticket&nbsp;<span>355735&nbsp;that the application to reproduce the issue was a bit large and complex. It makes it hard to narrow down the issue.&nbsp;<br /></span></p><div style="clear:both;"></div>