diff --git a/station_broadcast.lua b/station_broadcast.lua
index 96bc702..4c7187b 100644
--- a/station_broadcast.lua
+++ b/station_broadcast.lua
@@ -2,7 +2,7 @@
 -- ============================================================================
 -- 1. Configuration & Constants
 -- ============================================================================
-local APP_VERSION_TEXT = "v1.0.39"
+local APP_VERSION_TEXT = "v1.0.40"
 
 local CONFIG = {
     CLOUD_URL = "ws://stabadmin.fse-media.group",
@@ -2537,8 +2537,9 @@ function Main.loop()
                             reason = reason
                         })
 
-                        local alertKey = announceKey .. "::delay=" .. tostring(displayDelayMinutes) .. "::reason=" .. tostring(reason or "") .. "::cancel=" .. tostring(cancelled)
-                        if cancelled or displayDelayMinutes > 0 then
+                        local alertType = cancelled and "cancelled" or ((displayDelayMinutes > 0) and "delayed" or nil)
+                        local alertKey = alertType and (announceKey .. "::" .. alertType) or nil
+                        if alertKey then
                             if not State.announcedAlerts[alertKey] then
                                 State.announcedAlerts[alertKey] = now
                                 Utils.log("INFO", string.format("Train Alert: %s (ETA: %ds, Delay: %dm, Cancelled: %s, Reason: %s)", trainName, etaSeconds, displayDelayMinutes, tostring(cancelled), tostring(reason or "")))
@@ -2650,7 +2651,7 @@ function Main.loop()
                             reason = nil
                         })
 
-                        local alertKey = announceKey .. "::delay=" .. tostring(delay)
+                        local alertKey = announceKey .. "::delayed"
                         if delay > 0 then
                             if not State.announcedAlerts[alertKey] then
                                 State.announcedAlerts[alertKey] = now