it seems that SDK 15.2 is missing the uint64_t cast for the reload_value calculation again.... or am i missing something?
we use a 5 minute value, which does not work unless i modify the sdk to include the cast.
see my post from a couple years ago:
https://devzone.nordicsemi.com/f/nordic-q-a/24799/changes-to-nrf_drv_wdt_init-in-sdk-12-3-0