iOS 7 is not rendering Core Text in UITableViewCell

iOS 7 is not rendering Core Text in UITableViewCell

i have a custom table view cell which itself is a subclass of table view
cell.
Cell Hierarchy: UITableViewCell--->SubClassLevel1--->SubClassLevel2
In my view controller i am creating SubClassLevel2 cell and adding to
tableview.
i have core text views in both subclass. But the core text view in
SubClassLevel2 is rendering properly without any issues. But the core text
views in SubClassLevel1 is not rendering.
But i have put breakpoint and checked. I found that drawRect method of CT
Views which is in SubClassLevel1 also getting called. But i am no able to
see the text in screen.
But the same code executes well in iOS 6 and iOS 5. I am facing this issue
only in iOS 7.
Thanks in advance.