I would definitely re-visit the setup from start (turntable leveling) to finish (geometry, azimuth, etc.).
Something changed, and this will recruit your observational skills to check amongst other things, what Win (Moisin) and Doug have recommended.
Yup (Dan) - back to zero antiskate on both the Artisan Cadenza (aka Benz Ebony S-Class) and XV1s.
After tutoring a good friend in the use of an arc protractor, he eliminated the anti-skate as well (on a Stelvio, Tri-Planar, XV1s). Anti-skate has always been a bugaboo with him - finding that there were sections of a large selection of records that sounded better than others. This is no longer the case.
It's growing apparent that the better your geometry is set up, the less anti-skate you need.
Cheers,
Thom @ Galibier