I haven't tried the patch on my Snow. But, I noticed this distortion element in some patches too. Especially patches, which I'm dead sure didn't have this distortion.
It could be an OS thing.
There is a pad patch, D+C HS (Not sure of the name, but it's by Howard Scarr) which definitely didn't have distortion last year, lol. I'm running the latest release. It could be the OS update, but I will confirm the details, once this hangover fades away
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BMW V7