Hello, I'm afraid I might have bumped into a Corona Scatter bug, just doing a double check to see if anyone else can confirm because I only have access to a single workstation.
Scale Map on UV channel 1 - #1.jpg
Scale Map on UV channel 2 - #2.jpg
There's of course the workaround to shuffle the UVs, but I'd prefer to leave them as they are and to be able to map other things :)
Cheers,