Develop sliders jumped to the wrong position when clicked, on macOS 26.2 with a Magic Trackpad on an iMac. Say it was fixed by rolling back to a previous version

Update MacOS to 26.7.1 (or MacOS 27). That makes more sense than downgrading Lightroom Classic and running an old version of MacOS. It’s also the official advice from Adobe.

Take a look here:

It seems that the same or a similar issue.