Why sometimes Cubase stops to sound?

Hello, I came recently to Windows 10 from mac OS X.
I’m using RME RAYDAT sound card combined with a RME Multiface, using the the same ASIO driver for both of them(Asio Hammerfall).
Everything works as expected except that sometimes Cubase 11 Pro stops to “sound”.
If I simply change the buffer size to whatever else value, then the sound behaviour returns to normal.
Any idea what can cause this?