apply fix by boskid

better-air-filtering/control.lua

@@ -566,6 +566,7 @@ script.on_load(load)
 
 function init()
     -- gather all filters on every surface
+    air_filtered_chunks = {}
     global.air_filtered_chunks_map = {}
     for _, surface in pairs(game.surfaces) do
         local filters = surface.find_entities_filtered {

better-air-filtering/info.json

@@ -1,6 +1,6 @@
 {
   "name": "better-air-filtering",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "title": "Better Air Filtering",
   "author": "Joey De Pauw",
   "contact": "joeydepauw@gmail.com",