Vecna's Dispelling Sphere seems to move with me???

ShadyC

(PC if relevant.)

When I shoot out my Dispelling Sphere, it seems to strafe left or right depending on my own left/right movement relative to its path. This REALLY does not seem to be an optical illusion, as far as I can tell, but it is indeed difficult to be sure.

Step 1:

Has anyone else felt this way?