I have a similar issue—the tooltips display on the index glossary page but not on a post.
I see in the code for the post content that the class “glossaryLink” is not being generated, nor is the content for the tooltip in there.
I do want to know if I am inserting the link to the term correctly:
I just use the link option and select a glossary term post from the list of posts.
Here’s an example of a page post where the tooltip does NOT display for the first term (“nominal HIV-positive diagnostic test”) but, as I’ve inserted the code manually, it does disaply the second term (“administratively lost-to-follow-up”).