Hi Kartik,
As you told, that in MDG UI screen when you are pressing activate the change request got created/went for other approval. Just wanted to know:-
1. Whether the change request went to the next concerned approvers.
2. Did you try changing the data and then click on save and then activate.--Please let me know if in this way also you are getting the warning as "Unsaved data may get lost. Do you want to continue?"
Regards
Prateek Agarwal