App crashes (sometimes) with Fatal signal 11 (SIGSEGV), code 1

Question

I am developing an app with the HERE SDK, and everything worked fine until now. I get errors like this one:
Fatal signal 11 (SIGSEGV), code 1, fault addr 0x750057 in tid 10206 (FinalizerDaemon)
or this one:
Fatal signal 11 (SIGSEGV), code 1, fault addr 0x94789680 in tid 24605 (FinalizerDaemon)

and they make my app crash.

It's not always the same errors, but they always come all alone in my Logcat,with no other information.

In all my app I am using HERE objects and services, and even by printing the stacktrace I don't get more information about the errors.
I just noticed that these errors appear pretty much randomly, but only when I am using these objects/services.

I use a real device to test my app, a Sony Xperia Z3 compact, so I don't think it comes from here.

I am really lost, so if someone has any idea even on how to get more infos about the errors, please help

EDIT:

 05-09 23:04:10.148 6770-6782/? A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x4 in tid 6782 (FinalizerDaemon)
05-09 23:04:10.266 30179-30179/? I/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
05-09 23:04:10.266 30179-30179/? I/DEBUG: UUID: 5569a1b9-c913-4101-99fa-5099e2cadd48
05-09 23:04:10.266 30179-30179/? I/DEBUG: Build fingerprint: 'Sony/D5803/D5803:5.1.1/23.4.A.1.264/2418263178:user/release-keys'
05-09 23:04:10.266 30179-30179/? I/DEBUG: Revision: '0'
05-09 23:04:10.266 30179-30179/? I/DEBUG: ABI: 'arm'
05-09 23:04:10.266 30179-30179/? I/DEBUG: pid: 6770, tid: 6782, name: FinalizerDaemon  >>> com.david.metroz <<<
05-09 23:04:10.266 30179-30179/? I/DEBUG: signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4
05-09 23:04:10.294 30179-30179/? I/DEBUG:     r0 98327400  r1 00000000  r2 00000002  r3 00000000
05-09 23:04:10.294 30179-30179/? I/DEBUG:     r4 aec264c0  r5 b3df7acc  r6 98327400  r7 73652348
05-09 23:04:10.294 30179-30179/? I/DEBUG:     r8 6f9983a8  r9 b482a800  sl 12f1d820  fp b3df7abc
05-09 23:04:10.294 30179-30179/? I/DEBUG:     ip b5303950  sp b3df7ab0  lr b510717f  pc a0b7205c  cpsr a00e0010
05-09 23:04:10.294 30179-30179/? I/DEBUG:     #00 pc 000f405c  /data/app/com.david.metroz-1/lib/arm/libMAPSJNI.so (Java_com_nokia_maps_GeoBoundingBoxImpl_destroyNative+76)
05-09 23:04:10.294 30179-30179/? I/DEBUG:     #01 pc 001d7d4f  /data/dalvik-cache/arm/data@[email protected]@[email protected]
05-09 23:04:12.302 862-1274/? E/NativeCrashListener: Exception dealing with report
                                                     android.system.ErrnoException: read failed: EAGAIN (Try again)
                                                         at libcore.io.Posix.readBytes(Native Method)
                                                         at libcore.io.Posix.read(Posix.java:165)
                                                         at libcore.io.BlockGuardOs.read(BlockGuardOs.java:230)
                                                         at android.system.Os.read(Os.java:350)
                                                         at com.android.server.am.NativeCrashListener.consumeNativeCrashData(NativeCrashListener.java:240)
                                                         at com.android.server.am.NativeCrashListener.run(NativeCrashListener.java:138)

EDIT 2: I am now pretty sure that the crash happens when I am retrieving HERE objects from database using gson.

The following code works when everything is done in the same app runtime, but when I save a string in the database, close the app and then re-open it, I get the Fatal signal while converting the json string back to the object.

// to insert I create a json string and then insert it in the database
String mGbSortie = gson.toJson(geoboundinBox);

//and then to retrieve the data :
Type gbType = new TypeToken<GeoBoundingBox>(){}.getType();
geoBoudingBox = gson.fromJson(stringFromDb, listType)

I really don't know why it doesn't work.