The screen I have is not branded, I'm not sure who produces it, I bought it from off-the-road.de.

After some thinking I'm convinced it's the cause of the wobbles - it's higher than the original by 8cm, i know other have no issues with that size but I think the causes come from it not being that rigid as the original and that fact induces flexes into it that are carried on the rest of the bike. The profile might also be a cause although I'm not sure how different profile you can shape up.

Another thing to consider when replacing the screen is the way the edges are finished. This one has some quite rough edges and I suppose rounder edges would be better both to turbulences and noise. It did came with a rubber to fit on the side but I didn't put it on and have no idea where it's now either to check if things get better with that on.