diff --git a/src/fields.lua b/src/fields.lua
index 86d81dd..200e94f 100644
--- a/src/fields.lua
+++ b/src/fields.lua
@@ -468,7 +468,8 @@ core.register_on_player_receive_fields(function(player, formname, fields)
 		end
 
 		if tab.fields then
-			tab.fields(player, data, fields)
+			local ret = tab.fields(player, data, fields)
+			if ret == false then return end
 		end
 	end
 
diff --git a/src/hud.lua b/src/hud.lua
index 6f6841c..d74ba11 100644
--- a/src/hud.lua
+++ b/src/hud.lua
@@ -118,7 +118,12 @@ core.register_globalstep(function(dt)
 		local data = i3.data[name]
 		if not data then return end
 
-		data.window = get_window_info and get_window_info(name) or nil
+		data.window_timer = (data.window_timer or 0) + dt
+
+		if data.window_timer > 1 then
+			data.window_timer = 0
+			data.window = get_window_info and get_window_info(name) or nil
+		end
 
 		if data.show_hud ~= nil then
 			show_hud(player, data)