I picked up a grenade launcher bounty from Banshee. I have a grenade launcher equipped and I have gotten a bunch of kills with it so far but the progress bar has not gone up at all. It is stuck at 0%. Is this a bug?
You need to check whether it is a special ammo launcher or a heavy weapon launcher. There are two different kinds of grenade launchers. Some of them are smaller and don’t fall under the heavy weapon section. Sometimes there are weapon bounties to get kills with the smaller grenade launcher instead of the larger one. Check the bounty to make sure you are using the correct type of grenade launcher.