Same problem here since a few days. No sound at all when playing fort. Sound comes back only when football game or arena starts.... :S
It's normal for me.
A quicker way would be to just go into the 'Practice' game mode and then click the 'Back to menu' button on the GUI element in the bottom right corner. Sound will then play :).
had the same problem what was weird and fixes it for me is googling wilds io without dot and clicking on it :).
what the fk, thats true!
Customer support service by UserEcho