Facebook Version 6.5 Accessibility Problem

Hi, I have just updated the Facebook app to version 6.5 on an iPhone 5 with iOS 7 installed. I noticed that the button to open the friend request, messages, and notification have been moved to the bottom of the screen, which is not causing any problem at this point. The actual problem occured when I check my Facebook notification. For a strange reason, VO doesn't read out the notification when I touch them. I have tried the flick gesture, but it doesn't help. However, a click sound from Vo is heard when I go through the list of notification, indicating the item is being focused. I noticed the problem only occured when it is in the notification list. VO behave normally in the messages and friend request list. I don't know whether it happened to everyone. I would appreciate some suggestion or workaround to this problem. Is there anyone having the same issue? Thank you!