diff --git a/src/components/PostEditor/PostContent.tsx b/src/components/PostEditor/PostContent.tsx
index a598b260..d982bc45 100644
--- a/src/components/PostEditor/PostContent.tsx
+++ b/src/components/PostEditor/PostContent.tsx
@@ -63,7 +63,8 @@ import {
 import { getMediaKindFromFile } from '@/lib/media-kind-detection'
 import { hasPrivateRelays, getPrivateRelayUrls } from '@/lib/private-relays'
 import mediaUpload from '@/services/media-upload.service'
-import client from '@/services/client.service'
+import { successfulPublishRelayUrls, type TRelayPublishStatus } from '@/lib/publish-relay-urls'
+import client, { eventService } from '@/services/client.service'
 import discussionFeedCache from '@/services/discussion-feed-cache.service'
 import CreateThreadDialog from '@/pages/primary/DiscussionsPage/CreateThreadDialog'
 import { getReplaceableCoordinateFromEvent, isProtectedEvent as isEventProtected, isReplaceableEvent, isReplyNoteEvent } from '@/lib/event'
@@ -104,6 +105,42 @@ export default function PostContent({
   const { pubkey, publish, checkLogin } = useNostr()
   const { feedInfo } = useFeed()
   const { addReplies } = useReply()
+
+  const mergePublishedReplyIntoThread = useCallback(
+    (reply: Event, relayStatuses?: TRelayPublishStatus[]) => {
+      if (!parentEvent) return
+      const clean = { ...reply } as Event
+      delete (clean as any).relayStatuses
+      addReplies([clean])
+      const rootInfo = !isReplaceableEvent(parentEvent.kind)
+        ? { type: 'E' as const, id: parentEvent.id, pubkey: parentEvent.pubkey }
+        : {
+            type: 'A' as const,
+            id: getReplaceableCoordinateFromEvent(parentEvent),
+            eventId: parentEvent.id,
+            pubkey: parentEvent.pubkey,
+            relay: client.getEventHint(parentEvent.id)
+          }
+      const cached = discussionFeedCache.getCachedReplies(rootInfo) ?? []
+      const next = cached.filter((r) => r.id !== clean.id).concat([clean])
+      discussionFeedCache.setCachedReplies(rootInfo, next)
+
+      const urls = successfulPublishRelayUrls(relayStatuses)
+      if (!clean.id || urls.length === 0) return
+
+      const delayMs = 1600
+      setTimeout(() => {
+        void eventService.fetchEventWithExternalRelays(clean.id, urls).then((fresh) => {
+          if (!fresh || fresh.id !== clean.id) return
+          addReplies([fresh])
+          const merged = (discussionFeedCache.getCachedReplies(rootInfo) ?? []).filter((r) => r.id !== fresh.id)
+          discussionFeedCache.setCachedReplies(rootInfo, [...merged, fresh])
+          client.addEventToCache(fresh)
+        })
+      }, delayMs)
+    },
+    [addReplies, parentEvent]
+  )
   const [text, setText] = useState('')
   const textareaRef = useRef<TPostTextareaHandle>(null)
   const [posting, setPosting] = useState(false)
@@ -875,20 +912,12 @@ export default function PostContent({
         // Full success - clean up and close
         postEditorCache.clearPostCache({ defaultContent, parentEvent })
         deleteDraftEventCache(draftEvent)
-        // Remove relayStatuses before storing the event (it's only for UI feedback)
+        const relayStatuses = (newEvent as any).relayStatuses as TRelayPublishStatus[] | undefined
         const cleanEvent = { ...newEvent }
         delete (cleanEvent as any).relayStatuses
 
-        // Reply: add to UI and cache immediately so it shows without tabbing away (publish already emitted via NostrProvider)
         if (parentEvent) {
-          addReplies([cleanEvent])
-          const rootInfo = !isReplaceableEvent(parentEvent.kind)
-            ? { type: 'E' as const, id: parentEvent.id, pubkey: parentEvent.pubkey }
-            : { type: 'A' as const, id: getReplaceableCoordinateFromEvent(parentEvent), eventId: parentEvent.id, pubkey: parentEvent.pubkey, relay: client.getEventHint(parentEvent.id) }
-          const cached = discussionFeedCache.getCachedReplies(rootInfo) ?? []
-          if (!cached.some((r) => r.id === cleanEvent.id)) {
-            discussionFeedCache.setCachedReplies(rootInfo, [...cached, cleanEvent])
-          }
+          mergePublishedReplyIntoThread(cleanEvent, relayStatuses)
         }
 
         close()
@@ -928,14 +957,7 @@ export default function PostContent({
             if (parentEvent && partialEvent) {
               const clean = { ...partialEvent }
               delete (clean as any).relayStatuses
-              addReplies([clean])
-              const rootInfo = !isReplaceableEvent(parentEvent.kind)
-                ? { type: 'E' as const, id: parentEvent.id, pubkey: parentEvent.pubkey }
-                : { type: 'A' as const, id: getReplaceableCoordinateFromEvent(parentEvent), eventId: parentEvent.id, pubkey: parentEvent.pubkey, relay: client.getEventHint(parentEvent.id) }
-              const cached = discussionFeedCache.getCachedReplies(rootInfo) ?? []
-              if (!cached.some((r) => r.id === clean.id)) {
-                discussionFeedCache.setCachedReplies(rootInfo, [...cached, clean])
-              }
+              mergePublishedReplyIntoThread(clean, (error as any).relayStatuses)
             }
             postEditorCache.clearPostCache({ defaultContent, parentEvent })
             if (draftEvent) deleteDraftEventCache(draftEvent)
diff --git a/src/components/ReplyNoteList/index.tsx b/src/components/ReplyNoteList/index.tsx
index 03d39a0d..bf359144 100644
--- a/src/components/ReplyNoteList/index.tsx
+++ b/src/components/ReplyNoteList/index.tsx
@@ -28,6 +28,7 @@ import { eventService, queryService } from '@/services/client.service'
 import noteStatsService from '@/services/note-stats.service'
 import discussionFeedCache from '@/services/discussion-feed-cache.service'
 import { buildReplyReadRelayList, relayHintsFromEventTags } from '@/lib/relay-list-builder'
+import { eventReplyMatchesThreadRoot } from '@/lib/thread-reply-root-match'
 import { Filter, Event as NEvent, kinds } from 'nostr-tools'
 import { useNoteStatsById } from '@/hooks/useNoteStatsById'
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
@@ -272,27 +273,20 @@ function ReplyNoteList({
 
   const onNewReply = useCallback((evt: NEvent) => {
     addReplies([evt])
-    // Also update the discussion cache so the reply persists
     if (rootInfo) {
       const cachedReplies = discussionFeedCache.getCachedReplies(rootInfo) || []
-      const existingReplyIds = new Set(cachedReplies.map(r => r.id))
-      if (!existingReplyIds.has(evt.id)) {
-        discussionFeedCache.setCachedReplies(rootInfo, [...cachedReplies, evt])
-      }
+      const without = cachedReplies.filter((r) => r.id !== evt.id)
+      discussionFeedCache.setCachedReplies(rootInfo, [...without, evt])
     }
   }, [addReplies, rootInfo])
 
   useEffect(() => {
     if (!rootInfo) return
     const handleEventPublished = (data: Event) => {
-      const customEvent = data as CustomEvent<NEvent>
-      const evt = customEvent.detail
-      const articleThreadUrl = rootInfo.type === 'I' ? getArticleUrlFromCommentITags(evt) : undefined
-      const matchesThread =
-        rootInfo.type === 'I'
-          ? articleThreadUrl === rootInfo.id
-          : getRootEventHexId(evt) === rootInfo.id
-      if (matchesThread && isReplyNoteEvent(evt)) {
+      const ce = data as CustomEvent<NEvent>
+      const evt = ce.detail
+      if (!evt || !isReplyNoteEvent(evt)) return
+      if (eventReplyMatchesThreadRoot(evt, rootInfo)) {
         onNewReply(evt)
       }
     }
diff --git a/src/lib/publish-relay-urls.ts b/src/lib/publish-relay-urls.ts
new file mode 100644
index 00000000..09654a0b
--- /dev/null
+++ b/src/lib/publish-relay-urls.ts
@@ -0,0 +1,16 @@
+import { normalizeUrl } from '@/lib/url'
+
+export type TRelayPublishStatus = { url: string; success: boolean }
+
+/** Normalized relay URLs that accepted the event (for follow-up REQ). */
+export function successfulPublishRelayUrls(relayStatuses: TRelayPublishStatus[] | undefined): string[] {
+  if (!relayStatuses?.length) return []
+  return Array.from(
+    new Set(
+      relayStatuses
+        .filter((s) => s.success)
+        .map((s) => normalizeUrl(s.url) || s.url)
+        .filter(Boolean)
+    )
+  )
+}
diff --git a/src/lib/thread-reply-root-match.ts b/src/lib/thread-reply-root-match.ts
new file mode 100644
index 00000000..faff9fcb
--- /dev/null
+++ b/src/lib/thread-reply-root-match.ts
@@ -0,0 +1,24 @@
+import { getRootATag, getRootEventHexId } from '@/lib/event'
+import { getArticleUrlFromCommentITags } from '@/lib/rss-article'
+import type { Event } from 'nostr-tools'
+
+/** Matches `ReplyNoteList` / discussion thread root shapes. */
+export type TThreadRootRef =
+  | { type: 'E'; id: string; pubkey: string }
+  | { type: 'A'; id: string; eventId: string; pubkey: string; relay?: string }
+  | { type: 'I'; id: string }
+
+/** Whether a newly published/fetched reply belongs to the thread rooted at `root`. */
+export function eventReplyMatchesThreadRoot(evt: Event, root: TThreadRootRef): boolean {
+  if (root.type === 'I') {
+    return getArticleUrlFromCommentITags(evt) === root.id
+  }
+  if (root.type === 'A') {
+    const coord = getRootATag(evt)?.[1]
+    if (coord === root.id) return true
+    const rootHex = getRootEventHexId(evt)
+    if (rootHex && (rootHex === root.eventId || rootHex === root.id)) return true
+    return false
+  }
+  return getRootEventHexId(evt) === root.id
+}
diff --git a/src/providers/ReplyProvider.tsx b/src/providers/ReplyProvider.tsx
index 7b0f52d6..dd550467 100644
--- a/src/providers/ReplyProvider.tsx
+++ b/src/providers/ReplyProvider.tsx
@@ -69,7 +69,11 @@ export function ReplyProvider({ children }: { children: React.ReactNode }) {
       for (const [id, newReplyEvents] of newReplyEventMap.entries()) {
         const replies = prev.get(id) || { events: [], eventIdSet: new Set() }
         newReplyEvents.forEach((reply) => {
-          if (!replies.eventIdSet.has(reply.id)) {
+          const existingIdx = replies.events.findIndex((e) => e.id === reply.id)
+          if (existingIdx >= 0) {
+            replies.events[existingIdx] = reply
+            replies.eventIdSet.add(reply.id)
+          } else {
             replies.events.push(reply)
             replies.eventIdSet.add(reply.id)
           }