This blobbing has only occurred in normal sized hairy lion and not in small hairy lion or original "hairless" lion. I checked gcode and there is only two differences in settings used to slice the model. The one with blobs was printed with 3 perimeters and seam position: random, while the other two prints were printed with only 2 perimeters and seam position: aligned. Sliced with Slic3r 1.2.9.
The blobs happened at seam position, so I thought that might be the problem, but I never investigated further.
And it could also be the moisture in filament. I printed original lion when roll was fairly new, then I printed normal sized hairy lion a couple months later. Then I dried the filament and then printed small hairy lion.