NRF connect debugger stuck on arm reset.s

[DanZ]

Hello,

I am new to embedded programming and I'm trying to create a small application that uses BT advertisements.
I've tested my code on an NRF52840 dongle, and a board with an NRF52810 chip.

In a few cases, when trying to debug my code on either a board with an NRF52810 or an NRF52832, the debugger breaks immediately on \v2.0.0\zephyr\arch\arm\core\aarch32\cortex_m\reset.S

Trying to step over or continue just leads the debugger to hang, and it seems like the application doesn't continue to run.

With the NRF52810, just trying again the next day suddenly worked. I'm not able to get the NRF52832 working though.
Could this be a hardware issue (I've had some of these boards laying around for a while)? Or is it some other problem with my setup?

Thanks for your help!

[DanZ]

I'll add that I'm debugging via a NRF52 DK using P20. I think the setup and the wiring itself is ok, since this does seem to work against some of the boards that I have.