Why does my dimension tool stop working

I am using a mac running latest version of Sequoia and with latest version of SketchUp Pro. Intermittently, when I select the dimension tool and try to make a measurement between two points (intersections of lines) no points can be selected. There is no indication that the little pencil can select any point. If I save, close the file, and reopen it , the selection tool now will work.

There is an issue that macOS Sonoma introduced, that I wrote about here:

When you get the issue, try left-clicking to Finder, and left-click back into SketchUp, see if the inferencing then works ok.

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