kotlinx.coroutines: Exception in coroutines machinery (ClassCastException) affecting only few android 5 users

Kotlin 1.5.10, coroutines 1.4.3 (checked changelog - looks like not fixed) This is happening to 200 users (800 crashes) only on android 5 (I have at least 8000 android 5 users in last week.) Not reproducible.

Fatal Exception: kotlinx.coroutines.m0: Fatal exception in coroutines machinery for CancellableContinuation(DispatchedContinuation[Dispatchers.Default, Continuation at package.Repository$updateCacheVariants$1.invokeSuspend(Repository.kt)@2b36bba8]){Cancelled}@a821e66. Please read KDoc to 'handleFatalException' method and report this incident to maintainers
       at kotlinx.coroutines.DispatchedTask.handleFatalException(DispatchedTask.java:144)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.java:115)
       at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.java:571)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.java:750)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.java:678)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.java:665)
Caused by java.lang.ClassCastException: kotlin.a0.k.a.c cannot be cast to kotlinx.coroutines.internal.e
       at kotlinx.coroutines.CoroutineDispatcher.releaseInterceptedContinuation(CoroutineDispatcher.java:104)
       at kotlin.coroutines.jvm.internal.ContinuationImpl.releaseIntercepted(ContinuationImpl.java:118)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(BaseContinuationImpl.java:39)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.java:104)
       at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.java:571)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.java:750)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.java:678)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.java:665)

While I’m investigating why stacktrace is obfuscated (Firebase should deobfuscate stacktraces automatically), reporting it now so you may have some feedback.

The code in referenced repository is as following

 		GlobalScope.launch {
			try {
// generated retrofit suspend function and access property of response model
				val response: List<Variants> = retrofitService.getAllVariants(request).variants 
				cachedVariants.saveVariantsToCache(response)
			}
			catch (e: Exception) {
				logCouldntSaveCache()
			}
                 }