had that issue after I fixed the one above with the tracking roller.

Issue was after I switched to the rubber belts since they don't make the sandpaper belts anymore.

I know and am sure there are other fixes possibly better but what worked for me quickly was to just slice off about 1/32nd of an inch of the belt since it tracks nearly perfectly it's worked thus far although if the roller could be moved back a hairs width then that would fix the issue as well I'm sure and probably better.