Hello,
Its a bit related to my previous post on animations. I am using temporary fix for parsing animation from json file. I have a simple simulation of object running in circle. Position for x and z follow sine and cosine to make a circle. Rotation does full 360.
When I run it in bjs latest v5 it does what it suppose to which is a circle movement. When I run it in 4.2 it some shape with corners.
Related mentioned post here: Animation from json loading - #9 by Blake
We are not releasing fixes for 4.2 so you could use our preview version for 5.0 ?
In my project I use 4.2 and thats where I see the issue of the path being incorrect. I am not sure if its connected to json files format. I could try to recreate the animations manually in code. I would upgrade to v5 but I thought its not released yet.
Now when I think about it the issue could be related to the tangents in the sine and cosine for x and z positions.
v5 is fully stable no worries 
there are still a couple of in progress feats but nothing related to animations.
cool, I will give it a go then 