Elevating a voice call to a video meeting

[afeit]

Until recently, when we would elevate a voice call to a meeting, the voice call would stay connected.  Now, the only option is for the end user to use their computer/meeting audio.  Has anyone else experienced this? How can I revert it back so that the voice call can continue.  We us this feature so that our end users can share their screen, so do not need it to change the audio to be through a meeting.  We are trying to sunset another product we use for screensharing and all my agents are now reverting back to the old product as this is not working well.