diff --git a/gateway/platforms/base.py b/gateway/platforms/base.py
index 2e34242e..a262d900 100644
--- a/gateway/platforms/base.py
+++ b/gateway/platforms/base.py
@@ -908,6 +908,9 @@ class BasePlatformAdapter(ABC):
                 
                 # Extract image URLs and send them as native platform attachments
                 images, text_content = self.extract_images(response)
+                # Strip any remaining internal directives from message body (fixes #1561)
+                text_content = text_content.replace("[[audio_as_voice]]", "").strip()
+                text_content = re.sub(r"MEDIA:\s*\S+", "", text_content).strip()
                 if images:
                     logger.info("[%s] extract_images found %d image(s) in response (%d chars)", self.name, len(images), len(response))