Minecraft Sneak Double Bounce, Minecraft Bouncing When sneaking

Hello there, Whenever i sneak Once, My screen Kinda Bounces or you can say it Double Sneaks, Because of it i cannot ninja bridge, Whenever i sneak once, It sneaks twice or Bounces, Am suffering This issue In minecraft 1.16.4, i tested in 1.16.3 and 1.14 also, In those versions also It was not fixed, is there anything i have to change from settings or its Ingame Bug, Please reply and, You can refer the the attachment i have sended!