diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListener.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListener.kt
index 5435a35dbe1346..c9b7b1540b8e26 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListener.kt
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListener.kt
@@ -39,27 +39,35 @@ internal class InteropUIBlockListener : UIManagerListener {
   }
 
   override fun willMountItems(uiManager: UIManager) {
-    if (beforeUIBlocks.isEmpty()) {
-      return
+    val blocksToExecute: List<UIBlock> = synchronized(this) {
+      if (beforeUIBlocks.isEmpty()) {
+        return
+      }
+      beforeUIBlocks.toList().also { beforeUIBlocks.clear() }
     }
-    beforeUIBlocks.forEach {
-      if (uiManager is UIBlockViewResolver) {
-        it.execute(uiManager)
+
+    if (uiManager is UIBlockViewResolver) {
+      // avoid ConcurrentModificationException by iterating over a copy
+      blocksToExecute.forEach { block ->
+        block.execute(uiManager)
       }
     }
-    beforeUIBlocks.clear()
   }
 
   override fun didMountItems(uiManager: UIManager) {
-    if (afterUIBlocks.isEmpty()) {
-      return
+    val blocksToExecute: List<UIBlock> = synchronized(this) {
+      if (afterUIBlocks.isEmpty()) {
+        return
+      }
+      afterUIBlocks.toList().also { afterUIBlocks.clear() }
     }
-    afterUIBlocks.forEach {
-      if (uiManager is UIBlockViewResolver) {
-        it.execute(uiManager)
+
+    if (uiManager is UIBlockViewResolver) {
+      // avoid ConcurrentModificationException by iterating over a copy
+      blocksToExecute.forEach { block ->
+        block.execute(uiManager)
       }
     }
-    afterUIBlocks.clear()
   }
 
   override fun didDispatchMountItems(uiManager: UIManager) = didMountItems(uiManager)