Index: src/org/openstreetmap/josm/io/OsmServerReader.java
===================================================================
--- src/org/openstreetmap/josm/io/OsmServerReader.java	(revision 15840)
+++ src/org/openstreetmap/josm/io/OsmServerReader.java	(working copy)
@@ -178,7 +178,8 @@
                     .setFinishOnCloseOutput(false)
                     .setReasonForRequest(reason)
                     .setOutputMessage(tr("Downloading data..."))
-                    .setRequestBody(requestBody);
+                    .setRequestBody(requestBody)
+                    .useCache(false);
             activeConnection = client;
             adaptRequest(client);
             if (doAuthenticate) {