VoiceChat not working after using ServerTravel

Voip Talker works properly when I am in the lobby. Because I join the Lobby with Open Level (Create host or Join Server).
But when I switch to the Main Map with Server Travel from Lobby, the voice does not work on the Main Map.

I tried Empty map, not worked. I learnt that it is completely caused by Server Travel. I have been dealing with this for days, does anyone have any ideas?