Callings and releases

So my stake has, in the aftermath of the last general conference, been releasing elders quorum presidencies and high priests group leaderships and calling new elders quorum presidencies. One side effect of the way this all shook out is that releases were extended before the callings of people to replace them were made. That’s not the norm for these callings, though it certainly happens—for an obvious case, consider when the person who holds a particular position dies. (I think we can safely agree that death includes a release from the specific calling one had at the time.) It makes me wonder, though, whether there are any particular callings in the church where (cases of death aside) a release being issued before someone is called to fill that position is actually the norm. I haven’t thought of one yet, but i’m still turning it over in the back of my mind.