Frankly for me it's not at all surprising that this conversation/rift is taking place between them, it was bound to happen especially considering the way the two got together without resolving any of there previous issues, rather they did not even try to address it. Instead they started resolving everyone else's issues than theirs so about time that this happened.
Also I remember one of Durjoy Dutta's tweet was "is love without suffering love at all", I would frankly say this tweet is nothing but hogwash. Only suffering does not define true love or love without suffering does not mean it's not true love.
Also now I feel that Dev's dialog "Not all love stories have happy ending" is somehow going to come true in their case as well. Right now looks like Soha is the only bonding factor between them, nothing else.
Apologies for the long rant, just my POV, no offence.