not getting piety for giving away bishoprics

[burny26]

I am doing some major conquest and when giving bishoprics to pious men with pious traits (+ the +25 piety text in the diplomacybox before sending it) i am not getting anything.

Am i wrong or is this a bug?

 

[Dracko81]

http://forum.paradoxplaza.com/forum/showthread.php?639920-Assigning-Bishops-as-Byz.-Emperor-not-granting-the-25-piety&highlight=bishop