This might be tied to the other achievement bugs (https://forum-en.gw2archive.eu/forum/support/bugs/Merged-topics-Achievement-bug-no-chests-dailies-stuck) though it is somewhat different, as I was able to complete my achievements and I did receive my chest for it, but the chest had some things missing.
To be more precise: I just completed my daily achievements for 19th April 2014 and the chest did only include 5 silver an essence of luck and a mystic coin.
The usual drop of liquid karma was missing from the chest and also I received no XP and worst of all no Laurel 
Not sure if it makes any difference but I finished my last daily in PvP and opened the chest in the Heart of the Mists.
Screenshot is attached for reference.
