F10 key (Step Over) no longer working in Rhino Python Editor (binded to _PointsOn)

I started having this strange problem this morning. When I run a Python script step by step in the Rhino Python Editor , my F11 key (Step Into) works but my F10 key (Step Over) seems to be hijacked by the _PointsOn Rhino command. See below:

Does anybody knows how to get my debugger F10 (Step Over) functionality back???