iPhone 15 Pro Max Whatsapp Call

When I try to switch from iPhone 15 pro max voice to video call my audio from ear speaker to loud speaker is not converting and no option to enable loud speaker once convert to voice to video call. Also, when I close the whatsapp accedentilly the call is not disconnecting from the other end and unable to get back the call from my mobile, untill disconnect the call from other end it simply showing re-connecting. .. Does wny one facing similar problems..