This anomaly applies to Revision 3, build codes QFAA-Gx0, QFAB-Gx0, CIAA-Gx0.
EVENTS_HFCLKSTARTED might occur twice, and HFCLKSTAT might be wrong.
When running HFCLK with crystal.
HFCLKSTAT might be wrong when reading it after HFCLK is started.
Disregard HFCLKSTAT and EVENT_HFCLKSTARTED after first EVENT_HFCLKSTARTED.
This workaround is included in nRF5 SDK v15.0.0 and SoftDevices S140, S132, and S112 v6.0.0.