Rotel RA-1572 Integrated Amp Issues?

Just purchased this and the RCD-1572 CD player; Still breaking in.

I've noticed some disturbing clicking sounds in this amp. In one scenario, I'm streaming Tidal from My iMac (USB) to the Schiit Eitr to the Rotel (via Coax). While it's playing if I turn the light switch in an adjacent room on I hear a loud click, then silence for 3-4 seconds, then another loud click, then the music starts again.

I have had a Marantz HD-AMP1 in the Rotel's place for awhile and this never happened.

Would anyone who has had Rotel amps in their system have any ideas what is happening?

Thanks,

Don