P: photo edit slider thumb jumps on click (web version)

1) Click and hold a slider thumb under photo editing, for example in the "Light" or "Color" area, without moving or sliding the mouse

Expected behaviour

The thumb (the round button to control values by dragging along the track) should stay in it's initial position, wherever on the thumb the user clicks.

Actual behaviour

The thumb automatically jumps over to the right, suddenly changing the slider value.

This is unexpected behaviour, it should stay put until the mouse cursor moves, and then follow the mouse cursor position in the horizontal movements.

I'm guessing that in the underlying UI, on click the thumb is being set to the mouse cursor position without taking into account the width of the thumb (half the width of the thumb should be subtracted from the mouse position in order for the thumb to be centered on the mouse cursor). But actually that would not even work perfectly, if the user clicks slightly off center it would still jump a little bit to center the thumb at the mouse position. On click, the thumb position should not change at all, and it should only change based on the difference in the mouse horizontal position since the initial click, while the click / drag is active.

Chrome 128.0.6613.120 on MacOS

Here is a screen recording of this issue:
https://streamable.com/dhkh9n