This happened a couple times while playing Zendikar Expeditions Battle for Emaria.
Playing black node with Sorin, Grim Nemesis
I do not have full life. I attack with Killian and gain me some life. Next turn I draw and play Markov Purifier. Text says when it enters the battlefield if you gained life last turn, draw a card. Life had been gained, but no etb trigger, no card draw. I was able to draw normally, and I don’t think opponent had anything out to prevent me from drawing any extra cards.
(one pic shows battle log with life gain and etb on separate turns. The other shows a screen capture during battle, Markov Purifier has summoning sickness and I have no cards in hand.)
Thank you for all the information provided, this issue will be investigated!
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This card is still broken. Does not draw a card as it Enters The Battlefield when life was gained the previous turn. It’s lifelink ability does work though.