Ghosting on X axis (Falcon 2 22w)

Hi! I’m havin ghosting issues with Falcon 2 22w on the X axis. I use the Falcon daily, and this issue happened suddenly.

I checked the belts and pulleys and everything seems to be ok. I also tightened the belt on X axis, it is better now, but still failing, I tightened the belt the maximum I dare…

If I uncheck in lightburn the bidirectional fill, it engraves without ghosting, but still cuts the circles as ovals.

Any advice?

I wanted to buy some pulleys ( altough they seem to be OK) but I cant see them in creality store.

Got a pic?