I have had the following problem for a few days. When I play minecraft, the image warps when I sprint. What is normal in minecraft, but optifone does away with it. However, for a few days I have had the problem that it disappears when I play with optiifne. Yes, I've also installed Optifine, I can also play with shaders. So my problem is the picture warps when sprinting despite optifine. I have the problem with the vanilla launcher or with the badlion client. I play versions 1.8.9 and 1.16.1 / 3. Has anything been changed? I did nothing in the options except for setting the gamma to 3.0. Does / did someone have the same problem? If you had it, how did you solve it.
The warping has something to do with the Fov. That is quite normal but you can't turn it off in vanilla as far as I know but Badlion has a mod which I think is called "Fov changer". There you can adjust how your fov is while running, sprinting, etc.
Have that on servers more often that the setting in Optifine is reset for it. See if that happens to you too.
Video Settings> Dynamic FOV.
Video Settings → Set Dynamic FOV on the right side to OFF
