Q u o t e:
I set my hearthstone to the Scryer's Inn in Shattrath. However, I'm not resting (its a 20 sec logout), is this working as intended?

Also, you can port from Shattrath to the major cities in Azeroth. That's handy.

That's quite odd. Maybe try running out of Shattrath and back in? It provides rest like any inn or major city.

and later in the thread Blue says....

It doesn't appear to be affecting all players on all realms but this is now entered as a known issue and we're investigating the cause.

Yayz.