Yeah, as I said I connected the Wii directly to the OSSC with the official Nintendo Component Cable, fresh out of the box so there is no tearing or any damage whatsoever.
Missed that detail in your post, sorry. This is what I get for writing at midnight.
Have you tried using different cables to see if the problem persists? Or perhaps just use the OSSC’s default settings? I’m aware that profiles for the OSSC exist, though honestly I’ve never used them myself. I usually just fire up a console and select which line multiplication I want. So simpler.