Nethlink: No bidirectional audio on first call after system startup

[margit86]

Description:
When Nethlink is launched for the first time after a system reboot, the first incoming call has no bidirectional audio (no input or output sound).

However, after this first call, all subsequent calls work correctly with bidirectional audio.

Steps to reproduce:

1. Restart the computer.
2. Launch Nethlink.
3. Receive an incoming call.
4. Notice the absence of bidirectional audio during the first call.
5. Make or receive additional calls: audio works correctly.

Expected behavior:
The first call after system startup should also have working bidirectional audio.

Additional information:

Nethlink version: 1.2.0

Operating system: Edizione Windows 11 Pro