Hi, I've experienced a few times that Wathcer.Watch() would hang forever, the hanging happens on the following code:

watcher.Watch(
		context.Background(),
		key,
		clientv3.WithProgressNotify(),
		clientv3.WithCreatedNotify(),
	)

I'm using the release-3.1 version of clients, is this behavior expected? What is the reason for the hang? The key being watched on is already existing, but I don't think that matters?

My current plan of work around is to add timeout and retry to this call, let me know if you have any concerns with this approach.