diff --git a/astrbot/core/pipeline/preprocess_stage/stage.py b/astrbot/core/pipeline/preprocess_stage/stage.py
index 0265973b9a..6e9526dad6 100644
--- a/astrbot/core/pipeline/preprocess_stage/stage.py
+++ b/astrbot/core/pipeline/preprocess_stage/stage.py
@@ -65,6 +65,8 @@ async def process(
                             logger.debug(f"路径映射: {url} -> {component.url}")
                     message_chain[idx] = component
 
+        failed_record_ids: set[int] = set()
+
         # In here, we convert all Record components to wav format and update the file path.
         message_chain = event.get_messages()
         for idx, component in enumerate(message_chain):
@@ -78,6 +80,7 @@ async def process(
                     component.path = record_path
                     message_chain[idx] = component
                 except Exception as e:
+                    failed_record_ids.add(id(component))
                     logger.warning(f"Voice processing failed: {e}")
 
         # Also process Record components inside Reply chains (wav conversion)
@@ -94,6 +97,7 @@ async def process(
                             reply_comp.path = record_path
                             component.chain[idx] = reply_comp
                         except Exception as e:
+                            failed_record_ids.add(id(reply_comp))
                             logger.warning(
                                 f"Voice processing in reply chain failed: {e}"
                             )
@@ -141,7 +145,10 @@ async def _stt_record(record_comp: Record, is_reply: bool = False):
 
             message_chain = event.get_messages()
             for idx, component in enumerate(message_chain):
-                if isinstance(component, Record):
+                if (
+                    isinstance(component, Record)
+                    and id(component) not in failed_record_ids
+                ):
                     plain_comp = await _stt_record(component)
                     if plain_comp:
                         message_chain[idx] = plain_comp
@@ -152,7 +159,10 @@ async def _stt_record(record_comp: Record, is_reply: bool = False):
             for component in event.get_messages():
                 if isinstance(component, Reply) and component.chain:
                     for idx, reply_comp in enumerate(component.chain):
-                        if isinstance(reply_comp, Record):
+                        if (
+                            isinstance(reply_comp, Record)
+                            and id(reply_comp) not in failed_record_ids
+                        ):
                             plain_comp = await _stt_record(reply_comp, is_reply=True)
                             if plain_comp:
                                 component.chain[idx] = plain_comp
diff --git a/tests/test_preprocess_stage.py b/tests/test_preprocess_stage.py
new file mode 100644
index 0000000000..24f9840ef1
--- /dev/null
+++ b/tests/test_preprocess_stage.py
@@ -0,0 +1,83 @@
+from types import SimpleNamespace
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from astrbot.core.message.components import Plain, Record, Reply
+from astrbot.core.pipeline.preprocess_stage.stage import PreProcessStage
+
+
+def _make_stage(stt_provider: AsyncMock) -> PreProcessStage:
+    stage = PreProcessStage()
+    stage.config = {}
+    stage.platform_settings = {}
+    stage.stt_settings = {"enable": True}
+    stage.plugin_manager = SimpleNamespace(
+        context=SimpleNamespace(get_using_stt_provider=lambda _: stt_provider)
+    )
+    return stage
+
+
+def _make_event(messages: list) -> MagicMock:
+    event = MagicMock()
+    event.get_platform_name.return_value = "test"
+    event.is_at_or_wake_command = False
+    event.get_messages.return_value = messages
+    event.unified_msg_origin = "test:friend:test"
+    event.message_str = ""
+    event.message_obj.message_str = ""
+    return event
+
+
+@pytest.mark.asyncio
+async def test_failed_audio_conversion_is_not_sent_to_stt(monkeypatch):
+    failed_record = Record(file="failed.amr")
+    valid_record = Record(file="valid.wav")
+    messages = [failed_record, valid_record]
+    stt_provider = AsyncMock()
+    stt_provider.get_text.return_value = "transcribed"
+
+    async def convert_to_file_path(record):
+        return record.file
+
+    async def convert_to_wav(path):
+        if path == "failed.amr":
+            raise RuntimeError("ffmpeg not found")
+        return path
+
+    monkeypatch.setattr(Record, "convert_to_file_path", convert_to_file_path)
+    monkeypatch.setattr(
+        "astrbot.core.pipeline.preprocess_stage.stage.ensure_wav",
+        convert_to_wav,
+    )
+
+    await _make_stage(stt_provider).process(_make_event(messages))
+
+    assert messages[0] is failed_record
+    assert isinstance(messages[1], Plain)
+    assert messages[1].text == "transcribed"
+    stt_provider.get_text.assert_awaited_once_with(audio_url="valid.wav")
+
+
+@pytest.mark.asyncio
+async def test_failed_reply_audio_conversion_is_not_sent_to_stt(monkeypatch):
+    failed_record = Record(file="failed.amr")
+    reply = Reply(id="reply-id", chain=[failed_record])
+    stt_provider = AsyncMock()
+
+    async def convert_to_file_path(record):
+        return record.file
+
+    async def convert_to_wav(_):
+        raise RuntimeError("ffmpeg not found")
+
+    monkeypatch.setattr(Record, "convert_to_file_path", convert_to_file_path)
+    monkeypatch.setattr(
+        "astrbot.core.pipeline.preprocess_stage.stage.ensure_wav",
+        convert_to_wav,
+    )
+
+    await _make_stage(stt_provider).process(_make_event([reply]))
+
+    assert reply.chain == [failed_record]
+    stt_provider.get_text.assert_not_awaited()