The communication icon is missing
If you’re talking about the ATC communications icon down the bottom left, make sure you’re on a live server if you are make sure it’s showing all green statuses on the top right corner.
Also check you’re not accidentally in solo :)
This happens if a notification appears, or you put IF In the background for too long. Sometimes it comes back, other times it won’t. Moral of the story: always keep IF In the foreground and have a stable internet connection.
Thanks, that was the issue.