Did Apple change how iPhone Notifications work on the Mac?

Unless I accidentally stepped into an alternate dimension, I'm sure that originally iPhone notifications went to the Mac once you linked it with iPhone Mirroring, regardless of whether or not Mirroring was active. Recently, however, I have noticed that no longer functions in the same way. It seems that Apple changed it so that your phone has to be actively mirroring for any notifications to arrive from the iPhone.

Is this a glitch on my phone? Did they change it? or did I slip into the Multiverse?