OSnap panel, right click Disable stopped working

In the OSnap panel I can’t get the right click of the Disable box to toggle the OSnaps on or off. I’m sure it used to work, but has stopped working.

Right click any particular osnap selection and that works correctly.

Edit: The Filter panel works.

ver 8.4.2…

tia,
Monte

No ideas?

Just installed new Service Build, fixed it. Hopefully it stays fixed.