Problems with hiss, when remote is connected

Hello,

when my remote is connected to the Kemper rack, hiss is clearly increased (no hum).
Without remote, there is no hiss.
I noticed this at home and in my rehersal room.
Has someone noticed this, too?

SOLVED

The hiss was caused by a power supply that feeds a pedal in the loop.
Strangewise the hiss appeared sporadically and at times the remote was connected.
Everything fine with kemper and remote.
Thanks