In game voice issus

hello there ,

There is many iranian players get issue with in game Voice chat ( heroes of the Storm )

there is red massage and its call : failed to setup Party or Team Voice channel Retrying…

i have question : This is Part of US sanctions against Iran or its just a bug ?

i didnt change anything for 5 years but lost the voice chat for no reason , its near than 2 weeks for now .

hope you have any way to fix this problem , it make me mad & i cant talk with my team mates .

regards