diff --git a/api/public/swagger.yaml b/api/public/swagger.yaml
index 947aa3f..c006b26 100644
--- a/api/public/swagger.yaml
+++ b/api/public/swagger.yaml
@@ -1859,7 +1859,7 @@ paths:
                         application/json:
                             schema:
                                 $ref: '#/components/schemas/SessionState'
-            summary: 'Get session state (initialising, pending, running, completed, failed).'
+            summary: "Get session state (initialising, pending, running, completed, failed).\nPolling session state won't work in a load-balanced situation."
             tags:
                 - Session
             security:
diff --git a/api/src/controllers/session.ts b/api/src/controllers/session.ts
index 0f5cfef..c2acea4 100644
--- a/api/src/controllers/session.ts
+++ b/api/src/controllers/session.ts
@@ -31,6 +31,7 @@ export class SessionController {
 
   /**
    * @summary Get session state (initialising, pending, running, completed, failed).
+   * Polling session state won't work in a load-balanced situation.
    * @example completed
    */
   @Get('/:sessionId/state')