Apparently the same here. If I bring up an image with local adjustments in it, but don’t do anything with it, all is well. As soon as I open the local adjustment sliders and expose the masks, it leads to a problem where the app will not quit.
I believe this is related to the problem with the “Correction Preview” endlessly spinning thingy, which also occurs with local adjustments and leads to a force-quit. Linkety-link.
@George Yes, that’s three or four CPU cores pegged.