So I also began having issues with “digital noise” a few months ago (again). I got with Waves on it and tried a few things over a few days. I finally found someone there who figured it out. I already had the WSG buffer set at 192 sample. But that wasn’t the only buffer that needed to be adjusted. It ended up being a very simple change. In Soundgrid Studio, click on the Setup tab on top. Then select the Settings tab on the left. Check your network buffer. As I recall, it defaults to something like 208. Set it as high as you can. Mine is set to 1088 now and that fixed my issue.
Let me know if that fixes your issue.
Art