Majesty Stereo Mode Question

Hi,
so I put a Stereo Cable into my Majesty and switched it to Stereo Mode. The Cable goes Y Style from one Stereo plug to two mono plugs.
So i put both mono plugs into my Alesis io 2 straight into my DAW.
This works well, on channel one i got the magnetic signal (with a distorted sound from Amplitube), on the other channel I got the piezo signal into an acoustic simulation in my DAW.
The only thing that happens is, when i switch to Piezo on the guitar, I get the piezo signal (right channel with the acoustic simulation), but also the left channel gets a very very slight signal. It is very silent but due to the distorted channel it is recognizable.
When I switch to magnetic on the guitar, there is NO signal in the Piezo channel (how it should be).
Is that normal? Or is it maybe the cable?
The Piezo/Magnetic switch works fine and also in Mono Mode there are no problems.
Just curious why the magnetic channel also gets a signal (although very silent), when switched to piezo.

To be honest that is not really a problem, but I just want to know if I do anything wrong. I dont think theres anything wrong with the guitar (I already had an issue with the locking tuner 😀 .. but thatll be fixed soon. Also it stays in tune very well so that’s not really a problem.

Thank you guys.