Not displaying conflict

[naoliv]

Something is very wrong with JOSM.
I have download an area and removed a wrong way (154209524) from this data. Then trying to upload the data JOSM says:

Failed to delete node 1667801158. It is still referred to by way 154209524.
Please load the way, remove the reference to the node, and upload again.

Click Preparar a resolução de conflitos to load them now.
If necessary JOSM will create conflicts which you can resolve in the Conflict Resolution Dialog.

But there is nothing at the conflicts dialog! It's empty.

In console I can see:

INFO: POST http://api.openstreetmap.org/api/0.6/changeset/20326616/upload... 
INFO: Precondition Failed
ERRO: Error header: Precondition failed: Node 1667801158 is still used by ways 154209524.
ERRO: org.openstreetmap.josm.io.OsmApiException: ResponseCode=412, Error Header=<Precondition failed: Node 1667801158 is still used by ways 154209524.>
org.openstreetmap.josm.io.OsmApiException: ResponseCode=412, Error Header=<Precondition failed: Node 1667801158 is still used by ways 154209524.>
	at org.openstreetmap.josm.io.OsmApi.sendRequest(OsmApi.java:712)
	at org.openstreetmap.josm.io.OsmApi.sendRequest(OsmApi.java:582)
	at org.openstreetmap.josm.io.OsmApi.uploadDiff(OsmApi.java:526)
	at org.openstreetmap.josm.io.OsmServerWriter.uploadChangesInChunks(OsmServerWriter.java:172)
	at org.openstreetmap.josm.io.OsmServerWriter.uploadOsm(OsmServerWriter.java:214)
	at org.openstreetmap.josm.gui.io.UploadPrimitivesTask.realRun(UploadPrimitivesTask.java:250)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:82)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:150)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
INFO: GET http://api.openstreetmap.org/api/0.6/node/1667801158/ways
INFO: Way 154.209.524 with 9 nodes has incomplete nodes because at least one node was missing in the loaded data.

The problem is that indeed I have removed the way but there is no conflict. Nobody changed this data and I have download the full area. It's a normal deletion, without nothing different.
The problematic OSM file is attached (there are 98 objects that I can't upload due to this problem)

JOSM:

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-02-01 02:36:29
Last Changed Author: Don-vip
Revision: 6798
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-02-01 03:18:43 +0100 (Sat, 01 Feb 2014)
Last Changed Rev: 6798

Identification: JOSM/1.5 (6798 pt_BR) Linux Debian GNU/Linux unstable (sid)
Memory Usage: 722 MB / 1756 MB (144 MB allocated, but free)
Java version: 1.7.0_51, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u51-2.4.5-1
VM arguments: [-Djava.net.useSystemProxies=true, -Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found

Plugin: AddrInterpolation (30034)
Plugin: Create_grid_of_ways (29854)
Plugin: FixAddresses (29971)
Plugin: ImageryCache (30135)
Plugin: OpeningHoursEditor (30117)
Plugin: PicLayer (29854)
Plugin: SimplifyArea (30145)
Plugin: buildings_tools (30057)
Plugin: editgpx (29854)
Plugin: geotools (30147)
Plugin: jts (29854)
Plugin: merge-overlap (30034)
Plugin: notes (v0.8)
Plugin: opendata (30213)
Plugin: pdfimport (29913)
Plugin: poly (29854)
Plugin: reverter (30031)
Plugin: tagging-preset-tester (30220)
Plugin: todo (29154)
Plugin: turnrestrictions (30237)
Plugin: undelete (30207)
Plugin: utilsplugin2 (30200)

[naoliv]

Closed as duplicate of #9656.