Changing corner radius on a shape changes unrelated anchor point
MacOS Big Sur 11.6, Illustrator 25.4.1
(Older versions too, I specifically reinstalled Illustrator with preferences resetted to verify if the bug is still there on the newest version)
I have been having this issue randomly for a while, when rounding corners on some shapes, certain anchor points get displaced, often ruining symmetry. I have tried turning every kind of snapping off. It doesn't matter if the corner is changed from the panel or from the artboard. Doesn't matter if I have one corner selected on more, Illustrator sometimes decides to change a certain anchor point.
Before rounding the corners, I drew the shape by hand, and substracted out a small 4px circle close to the middle with the pathfinder, to avoid having duplicate anchor points.
Attached image of my result, last image is a close-up of the wonky anchor point.
Can you share the file?