Users displayed in picture in picture don't disappear when they leave

Describe the bug
Users displayed in picture in picture don't disappear when they leave. their video frame stays frozen but does not get deactivated unless the user chooses to manually close the picture in picture.

To Reproduce
Steps to reproduce the behavior:

1. Start a call with 2 users in it

2. Click on view video stream in picture in picture on one of the instances
   

3. have the other user leave the room

4. See error

Expected behavior
When a user leaves, picture in picture views of them on other instances should either deactivate or show a message saying they left.

Screenshots
If applicable, add screenshots to help explain your problem.
Before user leaves

After user leaves

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version: latest

Additional context

• Link you used?
  https://us.meething.space
• Branch you used? (Such as fix_audio)
  master
  Add any other context about the problem here.

Metric

• Perfomance / Benchmarking
• Latency
• Cross site scripting

Start by reproducing the two-user call and picture-in-picture sequence described in the issue, then trace how the picture-in-picture view responds when the other participant leaves. Confirm the chosen behavior—deactivation or a departure message—by repeating the reproduction steps and verifying that no frozen video remains.