Hey Antonis Papageorgiou,
the LR-16 works pretty fine for me, in Win10 and Linux, both with bitwig-studio.
There was one “downtime”, as the windows 1806 update broke the driver, but reinstalling it, solved it.
Never had any cracks/stutters/etc. Except of, when I set latency too low.
I use it for live recording of our band, using all 16 tracks parallel, on an i5 thinkpad t520.
So did you tried another pc, or was it alway the same?