Why can you switch to a facetime call from a Voice call but you can't revert back?

[scorpio vega]

Correct me if I am wrong...but is it not possible to switch seamlessly between a voice call to Facetime and then back to a Voice call without having to hang up and recall back?

I called my mom just now to show her a dress for a wedding party i am going to next week and i realized that i can't actually revert back to the call.

That just sounds odd for apple, unless I am somehow doing it wrong, that they don't make it seamless?

 

[MisterSavage]

I had a similar situation where had a facetime audio call on my watch, switched it to my phone to show the person something, and actually would have liked to switch it back to my watch.

 

[scorpio vega]

I had a similar situation where had a facetime audio call on my watch, switched it to my phone to show the person something, and actually would have liked to switch it back to my watch.

I am shocked since apple is all about the User experience and that is incredibly un-apple like. I would have thought that with handoff feature it would be something within the app.