Surface quality in dual mode

Hello

Whenever I'm printing on my Sovol SV04 in dual mode, the surface quality is significant worse than in single mode. All other settings in Cura are identical. It also happens with different kinds of material (PLA, PETG, ASA, PA...). Has anybody experienced something like this? Is there something you can do to avoid it?
I really don't understand how this happens...
I first thought it could be de end-stops that introduce a certain inaccuracy each time the printhead is "parked", but this would mean that the surfaces along the x-axis should be clean. But they're not.
So, any ideas?
Attachment 19154