Creating a Kotlin Native Background Dispatcher for Coroutine - ios

Question

I'm currently trying to write a dispatcher for iOS, to run Http requests in the background. My current attempt is the following object:
val runCoroutineDispatcher: CoroutineContext = NsQueueDispatcher
object NsQueueDispatcher: CoroutineDispatcher(){
override fun dispatch(
context: CoroutineContext,
block: Runnable
){
dispatch_async(
dispatch_get_global_queue(
NSNumber(double = DISPATCH_QUEUE_PRIORITY_DEFAULT.toDouble()).integerValue,
0)
) {
block.run()
}
}
}
If I try to use this dispatcher for a coroutine I always get the issue
Uncaught Kotlin exception: kotlin.native.IncorrectDereferenceException: illegal attempt to access non-shared de.ubimax.common.dispatcher.NsGlobalQueueDispatcher.$dispatch$lambda-0$FUNCTION_REFERENCE$1#8147aca8 from other thread
at 0 FrontlineClientCommon 0x00000001012d0fec kfun:kotlin.Throwable.<init>(kotlin.String?)kotlin.Throwable + 92
at 1 FrontlineClientCommon 0x00000001012c9ebc kfun:kotlin.Exception.<init>(kotlin.String?)kotlin.Exception + 88
at 2 FrontlineClientCommon 0x00000001012c9980 kfun:kotlin.RuntimeException.<init>(kotlin.String?)kotlin.RuntimeException + 88
at 3 FrontlineClientCommon 0x00000001012f92dc kfun:kotlin.native.IncorrectDereferenceException.<init>(kotlin.String)kotlin.native.IncorrectDereferenceException + 88
at 4 FrontlineClientCommon 0x00000001012fae84 ThrowIllegalObjectSharingException + 512
at 5 FrontlineClientCommon 0x000000010185cc9c _ZNK16KRefSharedHolder3refEv + 100
at 6 FrontlineClientCommon 0x0000000101879144 Kotlin_Interop_unwrapKotlinObjectHolder + 48
at 7 FrontlineClientCommon 0x00000001017aa184 _knbridge33 + 120
at 8 libdispatch.dylib 0x0000000108bed7fc _dispatch_call_block_and_release + 24
at 9 libdispatch.dylib 0x0000000108beebd8 _dispatch_client_callout + 16
at 10 libdispatch.dylib 0x0000000108bf12d4 _dispatch_queue_override_invoke + 872
at 11 libdispatch.dylib 0x0000000108c00160 _dispatch_root_queue_drain + 376
at 12 libdispatch.dylib 0x0000000108c00a88 _dispatch_worker_thread2 + 156
at 13 libsystem_pthread.dylib 0x00000001a6160f48 _pthread_wqthread + 212
at 14 libsystem_pthread.dylib 0x00000001a6163ad4 start_wqthread + 8
Sample code:
CoroutineScope(runCoroutineDispatcher).launch {
println("Hello World")
}
So far I only could find examples with the usage of dispatch_get_main_queue() instead of dispatch_get_global_queue().