tgkill - libQt5Purchasing.so

I'm having a LOT of this crashes on Android since I have moved to Qt 5.12 
 
The biggest issue is that I don't know what is causing it and I don't have nothing besides the stack trace below. 
 
I was wondering if you knew about this and if you can hint me on how to discover more about the cause of it.
 
Thanks
 

• • • *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** pid: 0, tid: 0 >>> com.imaginando.drc <<< backtrace:
       
      #00 pc 00000000000381e0 /system/lib/libc.so (tgkill+12)
      #01 pc 0000000000013fd1 /system/lib/libc.so (pthread_kill+52)
      #02 pc 0000000000014bef /system/lib/libc.so (raise+10)
      #03 pc 0000000000011531 /system/lib/libc.so (__libc_android_abort+36)
      #04 pc 000000000000fcbc /system/lib/libc.so (abort+4)
      #05 pc 000000000021cec5 /system/lib/libart.so (art::Runtime::Abort()+160)
      #06 pc 00000000000a7c93 /system/lib/libart.so (art::LogMessage::~LogMessage()+1322)
      #07 pc 000000000022a14b /system/lib/libart.so (art::Thread::AssertNoPendingException() const+358)
      #08 pc 00000000000d4357 /system/lib/libart.so (art::ClassLinker::FindClass(art::Thread*, char const*, art::Handle<art::mirror::ClassLoader>)+14)
      #09 pc 00000000001cf0e7 /system/lib/libart.so (art::JNI::FindClass(_JNIEnv*, char const*)+798)
      #10 pc 0000000000005967 /data/app/com.imaginando.drc-1/lib/arm/libQt5Purchasing.so