Not an answer but a workaround...I always use MultiCX on 3.1. It does everything the Commodore commodities do and much more.
So do I, but unfortunately the ClickToFront feature of MultiCX does not work correctly with the new layers.library by Thomas. The symptoms are that it does not 'click to front' in certain situations. Even if you turn off that particular feature of MultiCX (all of them in fact), it will still patch into that related code and not enable you to use Commodore's ClickToFront commodity correctly either.