Index: src/org/openstreetmap/josm/io/OsmServerChangesetReader.java
===================================================================
--- src/org/openstreetmap/josm/io/OsmServerChangesetReader.java	(revision 19056)
+++ src/org/openstreetmap/josm/io/OsmServerChangesetReader.java	(working copy)
@@ -57,7 +57,7 @@
     protected final InputStream getChangesetInputStream(long id, boolean includeDiscussion, ProgressMonitor monitor)
             throws OsmTransferException {
         StringBuilder sb = new StringBuilder(48).append("changeset/").append(id);
-        if (includeDiscussion) {
+        if (includeDiscussion || true) { // see #23642: work around bug in API
             sb.append("?include_discussion=true");
         }
         return getInputStream(sb.toString(), monitor.createSubTaskMonitor(1, true));