Yes, unfortunately I also had this coil whining. Not as a quiet background noise, but so loud that it was audible even in adjoining rooms. Unfortunately, replacing the unit twice did not improve the situation.

I'm lucky, it has happened a few times so far, at the beginning, after installation.
It comes to Man feeling after turning off power and turning on again (not via App or other Philips remote switches).

Otherwise they are quiet and I am satisfied 😊

Yes... I also have the whistling and buzzing with some light modes... I'll wait and see if it calms down over the next few weeks... if not, I'll have the part replaced...