Not only just this time they are playing good at their home ground I saw their previous match on their home play ground and what I've seen is that they've consistently done well in those matches except some few match. And I think with that consistency they were able to beat India and take the series in their favour. I also thought that they also hold the ability to win 3rd ODI and make whitewash India.
Third ODI will be played in a different venue. Pitch condition will be different there. I think Indian players will do better in that condition. Bangladesh had won the previous ODI series against India by 2-1, It was played in 2015. Probably this series will end in the same way. Indian players will get huge pressure from their cricket board if they lose the third ODI as well.
Yes third ODI match is going to held on Zahur Ahmed Chowdhury Stadium but even then the the pitch is different I think Bangladesh is going also in favour in this pitch too because it's also their home ground and the pitch is spin-friendly and currently I think Bangladeshis spinners are more better than India . And there is no guarantee that history will repeat again and again. But if Bangladesh plays with a less-performance thought that they are not in pressure, I think India will have a chance.