Now if I tap on an existing Graduated Filter pin, it adds Update Graduated Filter to the History list every time I tap on the pin.MacOS Mojave 10.14.6MacBook Pro 14.3
John, yes it should be easy, but... Every time I click on the edit pin, I have to undo the unnecessary and meaningless history entry. At least it's only the graduated filter and not the other two local filters too.
Updates to Camera Raw, Lightroom Classic, and the Lightroom Ecosystem were released yesterday evening and contain a fix for this issue. Please install the appropriate update and see if it solves this problem.