diff --git a/http-poja-apache/src/main/java/io/micronaut/http/poja/apache/ApacheServerlessApplication.java b/http-poja-apache/src/main/java/io/micronaut/http/poja/apache/ApacheServerlessApplication.java
index d8bf9e31a..2d84a7338 100644
--- a/http-poja-apache/src/main/java/io/micronaut/http/poja/apache/ApacheServerlessApplication.java
+++ b/http-poja-apache/src/main/java/io/micronaut/http/poja/apache/ApacheServerlessApplication.java
@@ -97,6 +97,8 @@ protected void handleSingleRequest(
             response.status(HttpStatus.BAD_REQUEST);
             response.contentType(MediaType.TEXT_PLAIN_TYPE);
             response.getOutputStream().write(e.getMessage().getBytes());
+            // Reset the buffer
+            sessionInputBuffer = null;
         }
         writeResponse(response.getNativeResponse(), out);
     }