Not A Bug Tarrian's Journal and Phyrexian Dragon Engine

[EHughes01]

I have just cast phyrexian dragon engine from my graveyard using the backside of Tarrian's Journal 'The Tomb of Alcazotz'. I would expect that as the card was cast from my graveyard it would allow me to discard my hand and draw 3 cards, however this did not happen during play.
Event# 263784838, Game 3

 

[Wizzerinus]

Not a bug, Dragon Engine was cast from the graveyard, which means it first went from the graveyard onto the stack, and then from the stack into play. So it actually entered from the stack, despite being cast from graveyard. Confusing I know.