Transparent texture leaves light shadow

I have a png texture with letters and transparent background (it’s a logo) placed 1mm in front of a wall. When I render it the whole bkgd of the image leaves a soft shadow at the wall, not just the letters. I can even see it at live preview. Lumion or vray have not the same bug, i.e. renders the same scene without this shadow, so it’s not my models’ fault. Used sketchup 2020, D5 1.8, 3080 gpu with 361.09 drivers.!
I enclose photos of the problem and renders with another app.

Rendered with other app 1|314x263 Rendered with other app 2

Hi there,

Could you provide some screenshots of the issue?