Weird Layer Shifts - Presumably from Slicer Errors  

Weird Layer Shifts - Presumably from Slicer Errors

I was printing this large vase mode print ( https://www.printables.com/model/432767-the-octahedroflake-a-higher-dimensional-analog-of  -- followed all his instructions) and got these really weird layer shifts - no clue why. I'm attaching all my design files and some images. 

I've had this happen before when I had toggled some other advanced setting. I think it was avoid crossing perimeters or something under the quality setting. But in this instance it was not this. As per the model instructions, I edited slice gap closing radius to 0mm, enabled spiral vase mode and set bottom solid layers to 1.

I know for sure that its not my printer because I ran prints in other PLA and other materials for hours and they came out fine - albeit they were all standard settings with no real changes other than support and infill.

If this is a purely slicer issue - I want to get to the bottom of this fast and give @Prusa engineers visibility fast, because this is something critically gating prints that users can't fix or alleviate themselves.