diff --git a/app/src/main/java/org/fcitx/fcitx5/android/FcitxRemoteService.kt b/app/src/main/java/org/fcitx/fcitx5/android/FcitxRemoteService.kt
index 282a31f6..9e292e04 100644
--- a/app/src/main/java/org/fcitx/fcitx5/android/FcitxRemoteService.kt
+++ b/app/src/main/java/org/fcitx/fcitx5/android/FcitxRemoteService.kt
@@ -1,6 +1,6 @@
 /*
  * SPDX-License-Identifier: LGPL-2.1-or-later
- * SPDX-FileCopyrightText: Copyright 2021-2023 Fcitx5 for Android Contributors
+ * SPDX-FileCopyrightText: Copyright 2021-2026 Fcitx5 for Android Contributors
  */
 package org.fcitx.fcitx5.android
 
@@ -27,7 +27,7 @@ import org.fcitx.fcitx5.android.utils.Const
 import org.fcitx.fcitx5.android.utils.desc
 import org.fcitx.fcitx5.android.utils.descEquals
 import timber.log.Timber
-import java.util.PriorityQueue
+import java.util.concurrent.CopyOnWriteArrayList
 
 class FcitxRemoteService : Service() {
 
@@ -35,8 +35,7 @@ class FcitxRemoteService : Service() {
 
     private val scope = MainScope() + CoroutineName("FcitxRemoteService")
 
-    private val clipboardTransformers =
-        PriorityQueue<IClipboardEntryTransformer>(3, compareByDescending { it.priority })
+    private val clipboardTransformers = CopyOnWriteArrayList<IClipboardEntryTransformer>()
 
     private fun transformClipboard(source: String): String {
         var result = source
@@ -75,6 +74,7 @@ class FcitxRemoteService : Service() {
             Timber.d("registerClipboardEntryTransformer: ${transformer.desc}")
             if (transformer.description.isNullOrBlank()) {
                 Timber.w("Cannot register ClipboardEntryTransformer of null or empty description")
+                return
             }
             if (clipboardTransformers.any { it.descEquals(transformer) }) {
                 Timber.w("ClipboardEntryTransformer ${transformer.desc} has already been registered")
@@ -85,6 +85,7 @@ class FcitxRemoteService : Service() {
                     unregisterClipboardEntryTransformer(transformer)
                 }, 0)
                 clipboardTransformers.add(transformer)
+                clipboardTransformers.sortByDescending { it.priority }
                 updateClipboardManager()
             }
         }