feed feature doesn't always work

[Rare]

If the skull is full with the mouth open and tapping it does not work, the issue might be related to line of sight. So you might need to re-position yourself if you are on a bridge or your enemy is around the corner.

The skull might not open even when it looks full for a few different reasons. Your enemy might be in the process of spawning in or being knocked down, or you might need one more kill for full feeding power.

If you are experiencing something outside of the listed conditions, please post the following:
1. What mission are you on?
2. Are you playing multi-player or solo?
3. Is the skull failing to open when full, or is your character failing to feed while the skull is already open?
4. Are you fighting a boss?

For me it happens on every map.

Solo or multi.

With skull pulsing with mouth open. Even after it doesn't work I've check to make sure i didn't lose blood. Its still opened and pulsing.

Mostly mobs but also happens at bosses.

Even standing in the midst of a group of zombies.