It has some weird lockups soo yea, if you want to get rid of them break it in a lot OR put some heavier springs and solve it like that about 4 days, it fixes that
I recommend modding the alignment mechanism so that each of the "different" edges (the edges that hook to the centers) is attached to a center. I suggest using superglue to do this. Once the mod is done, the cube is a lot more stable and smooth, and has far fewer internal lockups and catches.