I'm really not sure why it doesn't work for you. Which version of iOS & Marvis you have?Thanks Aditya for your detailed explanation.
So the change since iOS 8.4 affects skip forward/backward. But why was the first song in the album getting played and not allowing to play any other song? Was it a bug in iOS or Marvis and what caused it if not a bug?
I almost stopped playing music in Repeat One because of that bug and playing the whole album wasn't the ideal solution.
One tip I have for you is to keep Shuffle On in Marvis and then try to play the item, it'd definitely play the right one. And as you just want to repeat the song, shuffle shouldn't really matter. I know it's not a solution, but could work in your case because it's strange that you're facing the issue.
The first song playing Bug was in iOS's APIs when 8.4 was launched and still hasn't been solved in iOS 9, so, I have found a workaround to solve it.