Focusrite Saffire Pro 24 DSP and Cubase

I have saffire pro 14 and Cubase 9 won’t work. Everything is fine a few minutes and then audio just goes away, with few random crackles (and meters show red +200dB input :O) When i change asio buffer size from saffire MixControl a few times (which resets audio in a way I think) it starts to work again for a few minutes… but all in all, Cubase pro 9 is unusable. Cubase 8.5 works great.