Cubase/Neumanm TLM 103-Yamaha AG06 (leakage)

This is my present recording gear: Cubase/Neumanm TLM 103-Yamaha AG06 (leakage)

When the Neumann TLM 103 with 48v Phantom power is turned off using the Yamaha AG-06, I can still hearing intelligent sound seeing the faders picking it up. Any thoughts on this presumed leakage…I am using headphones no speakers.

TIA Alan Russell