Smooth idlers VFA on Y axis

I have a V-Core 4 IDEX
Disregard the horizontal lines issue (that was probably filament diameter fluctuation).

I'm getting these vertical lines that I assume are caused by the smooth idlers of the Y motors. If you check the pictures, only the side where we have more Y axis travel has these. Can anyone confirm? Has anyone tested toothed idlers?
The vertical patterns match the belts pitch. I get this on every print.