Plaits problem. High register

Hey guys,
Till yesterday I was having fun with the Plaits for some months now.
But unfortunately something strange is happening, the synth only plays notes in super high registers. Even if I sent notes in the -2 register.

My beatstep is not the problem because my other synths work perfectly. So it looks like the synth is broken somehow after a 2 months. Every melody is super super high and it is impossible to fix, also when I adjust the frequency knob range (in the manual).

Does anybody had this issue before? Should i sent it back?

Thanks!!
Cheers,
Thomas

Got it. Thanks