Pathos Classic Remix Clicking Changing Inputs

I'm trying out a Pathos Classic Remix from Upscale Audio. When switching from input to input, I'm hearing a clicking noise coming from the unit. As the switching is done by relays, this may be normal. But is this normal? Occasionally I'll hear it slightly through the speakers as well, but it's mostly from the unit.

I tried writing Pathos but got no response.