The grid's right-click handler never hit-tested objects, so right-clicking
a chart opened the menu of the cell underneath it. And since any button's
drag start grabbed an object, a right press that moved a little started
dragging the chart and no menu opened at all.
Right-clicking a chart, picture, shape or slicer now selects it and opens
its own menu (Delete; for charts also Select Data… and Format Chart
Area…). Only the primary button moves objects.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>