MOUNT Winter Vengence Performance Bug

Dear devs, I have just purchased the in-game MOUNT Winter Vengence and found there is a performance bug with it.

The special effect (dark blue around the tail) when sprint is broken and appears to be unfinished “blue stripe”, which significantly damaged the MOUNT performance. Also everytime I sprint with this MOUNT set, it keeps my game laggy no matter which part on the map I am.

I would love to attache a video or images to this post but this is my first time posting so I am still working on finding the right way for portals. But please have a look at the MOUNT set.