Crashlytics not giving proper crash reports

I am noticing it from my last few build, crashlytics is not sending the proper crash reports... In crash reports i can not debug on which class the crash occured..

Although I have tried uploading DSYM manually also and using fabric also, I do have followed all the instructions on their website..

I have also tried by uploading DSYM by downloading from itunesconnect but not nothing gives proper crash log

Sample Crash report

Fatal Exception: NSRangeException

0  CoreFoundation                 0x18cbcefe0 __exceptionPreprocess

1  libobjc.A.dylib                0x18b630538 objc_exception_throw

2  CoreFoundation                 0x18caad200 -[__NSArrayM removeObjectAtIndex:]

3  MyApp                           0x1001a3550 _hidden#4208_ (__hidden#4311_:498)

4  MyApp                           0x10012c008 _hidden#1377_ (__hidden#1463_:318)

5  MyApp                           0x10012f888 _hidden#1403_ (__hidden#1463_:753)

6  MyApp                           0x100132448 _hidden#1497_ (__hidden#1511_:352)

7  MyApp                           0x1001dc1b8 _hidden#5257_ (__hidden#5321_:209)

8  Foundation                     0x18d6c24cc __NSThreadPerformPerform

9  CoreFoundation                 0x18cb7d42c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__

10 CoreFoundation                 0x18cb7cd9c __CFRunLoopDoSources0

11 CoreFoundation                 0x18cb7a9a8 __CFRunLoopRun

12 CoreFoundation                 0x18caaada4 CFRunLoopRunSpecific

13 GraphicsServices               0x18e514074 GSEventRunModal

14 UIKit                          0x192d65058 UIApplicationMain

15 MyApp                           0x10018b9cc main (__hidden#3728_:14)

16 libdyld.dylib                  0x18bab959c start

Why it is _hidden#4208??

My issue was, I was creating the build using command line tools and no bitcode flag was used that time for it. so it was giving improper crash reports to me.

Now I include bitcode symbols in my IPA and then after uploading it to appstoreconnect.apple.com if I download the dsym's for my IPA and upload it to crashlytisc's missing dsym section I do get all proper crash reports.

Note : I Downloaded the DSYM from the build uploaded to appstoreconnect, as that DSYM includes symbols and only that solved my issue.