I feel ya. I really prefer PLA unless I need the ABS for something. I had the same problem today with a curved print, where I was printing close to the left edge. It started lifting, then the print got squished upward. I centered it more, and I didn't have the problem again. Could it be that the left side (or sides in general) aren't heating as evenly? I've clipped them down in the past (when I used rafts), but I don't like the finish you get with a raft.

I'd say try turning the print slightly if you can, or move it slightly more toward the center if it's something the model allows.