The handle at wrong position,

Set handle to a small frame size , Then set the value range too (0, 500) for example, you can see, the handle position is too right than expected when set small value, too left when set large value.

Reproduce the issue by using a small slider frame and a value range such as 0–500, then inspect the slider's handle-position calculation. Done means the handle is centered correctly for both small and large values within the configured range.

Written by the indexing model from the issue text.