I think the problem is that without a sticker on the plate indicating to the machine that it is a Smooth PEI plate, the machine does not use the right settings, even if you disable the plate detection (and even selecting the smooth plate in the preparation phase). I’m doing a test right now with the QR code I printed and glued to the right place and guess what : it is now working…
Bambulab should listen and provide QR stickers with their 3D effect sheets