Pred progress occasionally remains stuck
On rare occasions, predators may get stuck with permanent pred progress which no longer decreases over time. The predator progress ring only resets after they start eating a new prey.
This is due to the fact that prey sets its predator's swallow progress, basically copying their prey progress field to the predator's pred progress field. There are however circumstances in which this copying is canceled or skipped. When those circumstances occur, we make sure to set our predator's swallow progress to zero separately. Since this bug exists, it means we're forgetting to reset our pred's progress after we stop copying it.