I have found this most peculiar bug at least on my phone it is 100% reproducible "Hey Siri. Call home on speaker" Siri, responds that it is calling home on speaker but instead uses earpiece. I have found this ONLY happens when the phone is connected on WiFi calling! If I turn WiFi calling off forcing the phone to use the mobile/cell network instead, then Siri does what it is told. I can't imagine what bizarre coding error has resulted in this one! Has anyone else noticed this?