I had something similar happen, after turning off most plugins, I finally found that iZotope Ozone introduced the noise.
Turned it off and on again, and the noise was gone.
Any chance you got Ozone on your master bus ?
I had something similar happen, after turning off most plugins, I finally found that iZotope Ozone introduced the noise.
Turned it off and on again, and the noise was gone.
Any chance you got Ozone on your master bus ?