Hello,
I have an nRF52840 based custom board (myboard, NCS2.70)
its partitions node closely follows the nRF52840DK dts file:

both have &flash0 in the /chosen group
However when creating an nRF52840DK build it runs fine, while 'myboard' build crashes when mounting.
I've single-stepped both configurations and noticed that 'struct fs' is not initialized to the same values - specifically 'flash_device' member has different value.

What am I missing?
Thanks
