Behringer DeepMind 6

I got my first Deepmind 6 at the beginning of August 2019, unboxing in I was impressed from the more than acceptable assembling quality.
I connected the midi via USB and the audio in stereo directly to the mixer. Since then an incredible amount of problems occurred.
Midi notes/clock often fails, LFOs are not stopping and the machine keeps on playing, the only way to stop it is turning it off or change preset. And the extremely noisy output makes impossible recording good quality audio clips.
I sent it back to Thomann after two weeks, and i got it replaced with another deepmind 6, since I was hoping in a defective product.
But nothing, I have exactly the same problems. Deepmind 6 is potentially an amazing synthesizer, with amazing VCOs and amazing features. Unfortunately the internal software is absolutely disappointing, and this is making the whole machine unusable and completely useless.
I'm sure I'm gonna send it back once again, and change it with another product, unless Behringer itself will completely solve the problem.
I would have rated it 5 stars, but the bugs are totally destroying the product