Siri do not say „hmm?“ after iOS 12 Update

Since iOS 12, Siri doesnt say „hmm?“ anymore if you say the keywords and you do not know if she heard you. That was a „human-like“ Feature. I dont like the sound you can Turn on in Settings when activating Siri. The „hmm?“ or „aha?“ where pretty descent and it was a nice Feature. Do they delete that Feature?

anyone also missing That?