It is not from the slide. As Vance says, it is from the side of the sink drawer. It will continue to function, but continue to get harder. In my car the black strip holding the bearings about an inch apart also came out. Replaced at PDI.
I think the drawer guide and movement is strong enough, perhaps only with the sink covers, an typical trash bag and a few misc items (note, not pots and pans as well as six

empty wine bottles or two six packs of beer bottles


) in the trash. JMHO (and experience)