Straight draw out of postion

[nicky g]

PLO50 online. Everyone has about 50. Bad player UTG raises. I next in call w 6789 (suits irrelevant). No reads on player but the game is of the sort where a lot of people only raise w aces, and will happily bet again on a missed board. Two others call.

Flop 56t with two hearts, I have no hearts. Raiser bets pot of 10. Hero...? Easy all in? It's the possibility of someone calling w hearts that worries me.