This anomaly applies to IC Rev. Revision 2, build codes SICA-B1A, SIBA-B1A, SIAA-B1A.
NRF_POWER->EVENT_SLEEPENTER and NRF_POWER->EVENT_SLEEPEXIT are asserted.
After device reset.
NRF_POWER->EVENT_SLEEPENTER and NRF_POWER->EVENT_SLEEPEXIT registers are set to true after reset.
After reset, NRF_POWER->EVENT_SLEEPENTER and NRF_POWER->EVENT_SLEEPEXIT must be cleared before enabling them as IRQ sources.