mutil account tabs start BroadcastChannel event not work

[abj3ct10n]

Before submitting a bug report

• I updated to the latest version of Multi-Account Container and tested if I can reproduce the issue
• I searched for existing reports to see if it hasn't already been reported

Step to reproduce

1. create A&B tab account containers.
2. A & B website listen BroadcastChannel event.
3. A & B website BroadcastChannel event not work/not communicate

Actual behavior

use mult account open A & B containers, open www.domain.com website. BroadcastChannel event not work/not communicate

Expected behavior

not use mult account open www.domain.com website. BroadcastChannel event work success.

Additional informations

No response

Provide a copy of Troubleshooting Information page (optional)

No response

[bakulf]

This bug is invalid. The purpose of Container is to create separate contexts. If we allow BroadcastChannel cross-container, this is a tracking vector that would break the container isolation.