Waft emitter raids should only stop once the emitter is destroyed or the player is killed.

[Timo4545]

I'm so tired of being halfway through a waft raid and the bugs, having destroyed nothing, decide to just get up and leave. It's so infuriating to have an entire emitter full of items basically be wasted, not because they can't find their way to me but because they trickle in so slow that by the time they arrive they have a minute or two before leaving again. 

 

Maybe once a point the bugs get a marker over them so they don't cause the game to get stuck in a permanent raid state.