Darn, Esbern bug still isn't fixed... at least not on the "quest bug" list.
As I understand it, this is a regression introduced by one of the 1.3.x.x updates and was previously working. There have been cases where fixes for regressions were not mentioned in the release notes (e.g. treasure map chests). It is possible they don't mention fixes for regressions if they can get away with it. Backwards-flying dragons and broken resistances are cases where they couldn't get away with it because of how well-known they were.
Regressions should be the highest-priority fixes for any developer and I'd expect Bethesda to follow this same formula. Let's wait and see what's actually fixed by the update, since the release notes typically do not reflect every fix that the update contains.