SystemVoIP (Party) not being unsuppressed when app quits

As doc says

In our UE4 app we suppress Party when users open a specific level, by calling

ovr_Voip_SetSystemVoipSuppressed(true);

The problem is that the SystemVoIP does not get unsuppressed when we close the app. We also tried to manually terminate all UE4 proccesses, but still we can't hear voices from the party. Also by creating a new party we can't hear the other players. In order to have the party working again we have to restart the Oculus app.

Is it normal with UE4 apps? We are using version 4.16.3 of the engine and the Oculus subsystem's platform VoIP (I suspect the SystemVoip is not being reactivated because the process which manages the audio is not the UE4's one).