webrtc: fix detecting closure of some sessions (#4204)

[aler9]

Fixes #4204

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 56.49%. Comparing base (5cb5dc4) to head (bffc481).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/protocols/webrtc/peer_connection.go	87.50%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4212   +/-   ##
=======================================
  Coverage   56.48%   56.49%           
=======================================
  Files         202      202           
  Lines       20648    20656    +8     
=======================================
+ Hits        11663    11669    +6     
- Misses       8116     8118    +2     
  Partials      869      869           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[github-actions]

This issue is mentioned in release v1.11.3 🚀
Check out the entire changelog by clicking here