The current language for hidden replica set members says:
Hidden members, however, do vote in elections.
This statement can be interpreted that hidden members must vote in elections. There are cases (such as CS-17816) where hidden members do not vote in elections. I am suggesting softening the language to say:
Hidden members, however, can vote in elections.
... to illustrate the point that they are able to vote but leave open the possibility that they might not in certain cases.