The game was not delayed because of "A bug".
The game was delayed, as you can read here, beause it was not yet up to par for what the Devs want to deliver to the players.
A quick quote from the delay message:
"we’ve come to realize that portions of the game still need more polish to bring them up to our standards. We made a commitment to ourselves and to all of you that we would deliver a Battle Royale experience like no other – but we just aren’t there yet."
I assure you that is is not just 1 bug that is causing the delay. The devs have made a ton of progress, as anyone with pre-alpha could tell you.. assuming we were not bound by the NDA. Please have patience friend. The game is coming along nicely, and I assure you the Devs are not dead. They are working tirelessly to deliver on their promise to bring us an amazing game.