The latest version is the 11.2 patch for CC 2015. Have you installed that?
There are other users reporting similar problems. If you have installed the patch and it continues, I recommend rolling back to the 2014 version (see How to Find and Install Previous Version of Adobe Apps in CC 2015 | Adobe Customer Care Team) and be sure to update that to the latest patch as well.
Sorry to hear that your documents are crashing. Can you please share one such document at firstname.lastname@example.org with subject 'For Anshul: Crash file", it will help in narrowing down the issue and find out the cause.
Also on what OS you are experiencing the issue.
It may be worth noting where you are saving (own hard drive, USB key, external disk, cloud, network...)