Xcode cannot symbolicate my crash logs even though I have correct .dSYM file

I have been observing this that when ever my app crashes i get the crash log and try to symbolicate it but following happen

1. When I use xcode to symbolicate, it never symbolicates the addresses of the crash
2. When I use atos command specified developer.apple.com technotes it either gives some other class function name that does not have to do any thing with the crash
3. I have used other methods like symbolicatecrash script but the result is same as before.
4. I also tried solution given stackoverflow.com/questions/7932992 but did not succeed
5. I created a demo crash and tried to change my scheme of the app for "Run" and changed "build configuration" to "release" to check if the crashes symbolicate when I run the app directly to device, I test the app, the demo crash occurs and in this case the crahes get symbolicated.
6. I created a demo crash in a new app and created an archive and export IPA, used this ipa in a device to recreate that crash but still xcode could not symbolicate that crash.

I don't get why is it behaving this way,

I looked into the archives to find my dSYM file and can locate it there but could not symbolicate it using any of the processes stated above.

A guidance will be helpful!

I was working with code back to see if there can be any impact of bitcode with help of a friend, found that while exporting archive to IPA, it asks me to rebuild with bitcode (which was checked) I just tried and unchecked it to create the IPA and this time my app crash logs were symbolicated, I still don't know why this happens because apple recomends to rebuild with bitcode while submitting apps. I am looking for more answeres for why is it happening? Will keep you posted (also a enlighten me if there are any misses.)