Seamless group switching/joining?

When you are in a call with one person and you want to add another person if you have an old group chat with those 3 people already in it, it will suggest using that group but if you select it you leave the current call and start calling the group chat without the person you were originally in the call with, unlike if you just create a new group it will take the person you are in the call with and they don't need to tab out to join the chat again it's seamless. so you end up with like 30 of the same group chats. Would be cool if when you select the old group and it starts calling but also takes the original person you were in a call with and doesn't just start ringing them