Sprinting particles appear when shielding directly from sprint

If you are sprinting and use your shield, there will be sprinting particles at the feet. This only occurs directly from a sprint. If you shield THEN try and sprint, then the problem will not occur.

I don't know why, but it always errors when I try uploading photos, so here is a link instead (photo WITHOUT the F3 screen up is in 1.16.4 and other photo is 20w51a)

https://ibb.co/CBH0Bg3
https://ibb.co/PNJLqXT