weird wall issue but not until about 30 layers up. Maybe a slicer issue?

[TTVert]

I've got this print 45 deg to the bed so it's not like it's an issue w/ bed leveling on one axis. Also the bottom layer laid perfectly flat and looked great on all of these so I cannot see this being a leveling issue. It's done it on every drawer I've printed but only on this side and nearly the exact same way. The other interior wall on the opposite side looks fine. I'm printing in repetier using cura's embedded slicer on a maker select plus using 1.75 PLA at 60mm/sec print speed, 215/50C. 80mm/sec inner perimeter, 60 mm/s outer perimeter and 100mm/sec infill. This only happens on one wall and again the print is 45 from any axis so to follow an entire wall most the way makes me think something else is amiss here. I'm starting to think is the slicer doing this. What do you guys think??


Thanks
Dave