Reposting the answer here as well. 
I think the issue is that the abbrify plugin skips link tags by defualt. You can try to fix it by modifying the code, deleting line 16 in head_tag.html
'a': 1,
Let me know if it worked or if you need more guidance.
Note, for linkify theme there is a separate user setting to modify which tags are skipped. I’ll submit a PR to this repo as well when I get a chance.