Random white noise - disk cache spikes

Hello Everyone, I am totally new to forums, please excuse inappropriate behavior until I get my sea legs. I am not sure I am posting this question properly.

Since I installed Cubase 10 I have been getting deafening bursts of white noise, such as I haven’t heard since the very beginning of midi in the 80s. Can anyone tell me a remedy? It is certainly damaging to the hearing, my ears are ringing.

Thank you!

Mac 10.11.6, UR-RT4, Cubase 10