I've edited and retagged several posts in the past with no problem, but now I've been occasionally noticing that I am unable to retag or edit (some) questions. Any idea why this is?

THIS QUESTION for example does not show me the edit or retag links.

I am below 2000 rep, which I know would explain the retag link disappearing, but not the edit link too. As suggested in THIS ANSWER. And as far as I can tell, the questions this is happening to are not protected or closed so what gives?!

Has anyone else ran into this situation?