JQuery Mobile Panel not working navigating back to first page

JQuery Mobile Panel not working navigating back to first page

I am hit with an issue which is blocking me now. I have a panel which can be opened from all my pages and I am using External Panel ( new in JQM 1.4.0) to achieve this which is pretty cool. Panel has links to different pages which are used for navigation. Everything was working fine, until I changed all the transition: 'slide' to transition:'none' for some obvious performance reasons. After I removed the transition Panel started to give weird problems

I have created a jsfiddle for better understanding. Open the panel by clicking the 'Menu' button, click on the 'Go to Page Two' link. This will call a JS method from where I use changePage to pageTwo (I should go through JS method as per design, I can't go like #pageTwo). Now click on Back button to go back to #pageOne. Now if you click on the Menu button it doesn't open. Surprisingly, this whole thing works if I use any transition** while doing changePage to pageTwo, 

I found a similiar issue here, but there is no solution. Any help is appreciated.