Index: trunk/src/org/openstreetmap/josm/gui/layer/AbstractTileSourceLayer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/AbstractTileSourceLayer.java	(revision 14259)
+++ trunk/src/org/openstreetmap/josm/gui/layer/AbstractTileSourceLayer.java	(revision 14260)
@@ -1565,5 +1565,7 @@
                          *  See: #14562
                          */
-                        ts2.loadAllTiles(false);
+                        if (!ts.hasLoadingTiles()) {
+                            ts2.loadAllTiles(false);
+                        }
                     }
                 }