Frito's had it since new. Same thing - driver's side only. I think it's related to the length of the arm and, as others have posted, non-perpendicular blade attack angle.
I've never had the courage to bend my blade arm. I just live with it. Shooting some soapy windshield washer fluid frequently stops it, at least temporarily.
One day, I'll scrounge an arm from a wreck and twist it, just to see if it helps.
Various blades all have all shown the same problem, although some of the newer formulations with teflon (PTFE) might work. As Vic says "I have no data"
Anyway, you're in the desert. Whaddya you care?