when change brush size shortcut, very slow. why?

As you know, [ + ] is key for change brush size.

ince yesterday, if you suddenly press the keyboard, it should shrink smoothly and grow in size smoothly... It's choppy and weird.
When I check the brush panel on the left, the number indicating the size of the brush goes up and down quickly, but Photoshop doesn't seem to respond. Why is that?
Photoshop has been reinstalled twice today.
Photoshop in 2019 and 2021 all occur the same.
I tried reinstalling and rolling back the graphics driver.
This is Windows.
It suddenly became like this.