We have tried to reproduce this on your town but can`t, as it`s working just fine on our end. For example you have a quest in Makkada now - and we can go in, accept it and go back to the world map just fine.
Can you please tell us if you get this hang-up while doing the same action in Makkada?
We need to know how to reproduce this problem in order to fix it. Thanks for your help!