Actually, this probably IS a guard point issue. Anji's j.S has a faulty GP during the early frames of startup, which cause things to function as if they've been blocked. (In this case, the gold burst) I only tested it for a little bit in the US version of AC, but I was able to get several instances where I received no tension for the gold burst. Additionally, any time the tension gain did not occur, it was never considered a counter hit.
In the video, you can see that Anji is in the startup for J.S just as the burst connects. No counter hit and no tension gain occurs.
On a side note, if Anji is just about to land, the GP will function properly, and you can do a special/FB/OD if you'd like.