Index: openacs-4/packages/proctoring-support/www/resources/proctored-page.js
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/proctoring-support/www/resources/Attic/proctored-page.js,v
diff -u -r1.1.2.17 -r1.1.2.18
--- openacs-4/packages/proctoring-support/www/resources/proctored-page.js	19 Nov 2020 18:16:15 -0000	1.1.2.17
+++ openacs-4/packages/proctoring-support/www/resources/proctored-page.js	8 Mar 2021 16:52:22 -0000	1.1.2.18
@@ -138,7 +138,11 @@
             }
         }
         function errorHandler() {
-            uploadQueue.unshift(formData);
+            // In the case of error + timeout, make sure we do not
+            // reinsert the failed picture twice.
+            if (!uploadQueue.includes(formData)) {
+                uploadQueue.unshift(formData);
+            }
             reschedule(10000);
         }