I have a quick question, or more like looking for insight from somebody: I have a ConflatedBroadcastChannel to which I open multiple subscribers each separately as a new Job within parent scope like:

parentScope.launch { sub.consumeEach { ... } } 
parentScope.launch { sub.consumeEach { ... } } 
parentScope.launch(NonCancellable) { sub.consumeEach { ... } }

Now the last one job has extra NonCancellable context, am I correct to assume that the last subscriber won't closed if I would cancel the parentScope ?

yes, but be aware it won't delay the parentScope's Job from joining