Visibility fault in PLE (and others)

Disappointed to find that 10.0.10 has not fixed this visibility and functionality bug. Others have told me this fault may apply to other areas with drop down menus. Reproducable problem: Compile a list of PLE actions greater than 52 (number perhaps related to screen resolution). Menu dropdown list becomes blank, items can be revealed and selected with mouse movement, but items greater than 52 cannot be selected.