Spells dont hold if recast right at spell fade time.
 

Ive had this problem with yaulp a few times now on my pally, if the spell finishes casting at the exact same time as the previous yaulp fades, the buff does not refresh, but the spell is infact casted and waiting on recast timer. Not a huge issue, but im sure it could get annoying.

This bug actually existed on live. It happened to me many times when attempting to recast arch shielding (12.0 casting time), since I would usually stand up to start casting when I saw the buff icon flashing (which occurs at 18 seconds remaining). I learned to recast at 30 seconds or so or lose the extra hp the buff provided when I let it fade, then recasted it, since i hate wasting mana like that...

Fixing it here would be great, but thought i'd confirm its existence on live...