Unable to adjust gradients by interacting with the bar.

If I attempt to adjust a gradient by dragging the bar ends, the bar just vanishes. Sometimes if I catch the bar end just right, I can drag the gradient around visually, but without seeing the UI bar that represents the angle of it, I have no point of reference and there’s no guarantee I’ve actually clicked on it. Most the time it just vanishes.

Restarted, checked for updates (none), restart again… same behavior.

Windows 11

Related video evidence: