Adding the address is working fine. I could see in Database. When Created a new order I am asked to create address again though there is one address already available.
Now the fun begins while debug
After I put 2 console.log statement in add.js and addressbook.js oncreated() method, it starts working fine and shown the grid with addresses. Not sure if it is due to Flow Router change or something else?? . Will continue to debug and see if I found something will send a PR.