Bug in displaying multipolygon

[info@…]

What steps will reproduce the problem?

1. Download a small area containing the coastline of the "Markermeer" (relation 49368)
2. Via the relationship editor, do "download all members"

What is the expected result?

All elements of the multipolygons are displayed

What happens instead?

Not all elements are displayed, even though they are downloaded. I can select the nodes that are unseen.
JOSM gives "unexpected exception" errors

Please provide any additional information below. Attach a screenshot if possible.

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-09-06 00:16:07 +0200 (Tue, 06 Sep 2016)
Build-Date:2016-09-05 22:21:00
Revision:10966
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10966 en) Linux Ubuntu 16.04.1 LTS
Memory Usage: 1188 MB / 3540 MB (598 MB allocated, but free)
Java version: 1.8.0_111-8u111-b14-2ubuntu0.16.04.2-b14, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080, :0.1 1920x1080
Maximum Screen Size: 1920x1080
Java package: openjdk-8-jre:amd64-8u111-b14-2ubuntu0.16.04.2
VM arguments: [-Djosm.restart=true, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
+ PicLayer (32796)
+ pt_assistant (32990)
+ turnrestrictions (32796)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/Maxspeed-zones&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/PublicTransportOneClick&zip=1

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1

Last errors/warnings:
- E: java.net.SocketException: Socket closed
- W: java.net.SocketTimeoutException: connect timed out
- E: java.net.SocketTimeoutException: connect timed out
- E: java.util.concurrent.ExecutionException: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: java.net.SocketTimeoutException: connect timed out
- W: java.net.SocketTimeoutException: connect timed out
- E: java.net.SocketTimeoutException: connect timed out
- E: java.util.concurrent.ExecutionException: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: java.net.SocketTimeoutException: connect timed out
- W: java.net.SocketTimeoutException: Read timed out
- E: java.net.SocketTimeoutException: Read timed out
- E: java.util.concurrent.ExecutionException: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: java.net.SocketTimeoutException: Read timed out


=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (19) of main
java.lang.NullPointerException
	at org.openstreetmap.josm.gui.MapViewState$MapViewEastNorthPoint.getInViewX(MapViewState.java:581)
	at org.openstreetmap.josm.gui.MapViewState$MapViewPoint.oneNormInView(MapViewState.java:509)
	at org.openstreetmap.josm.data.osm.visitor.paint.AbstractMapRenderer.isLargeSegment(AbstractMapRenderer.java:199)
	at org.openstreetmap.josm.actions.mapmode.SelectAction$VirtualManager.activateVirtualNodeNearPoint(SelectAction.java:1197)
	at org.openstreetmap.josm.actions.mapmode.SelectAction$VirtualManager.access$300(SelectAction.java:1158)
	at org.openstreetmap.josm.actions.mapmode.SelectAction.giveUserFeedback(SelectAction.java:256)
	at org.openstreetmap.josm.actions.mapmode.SelectAction.giveUserFeedback(SelectAction.java:235)
	at org.openstreetmap.josm.actions.mapmode.SelectAction.mouseMoved(SelectAction.java:473)
	at java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:330)
	at java.awt.Component.processMouseMotionEvent(Component.java:6578)
	at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3342)
	at java.awt.Component.processEvent(Component.java:6302)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4889)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4538)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
	at java.awt.Container.dispatchEventImpl(Container.java:2280)
	at java.awt.Window.dispatchEventImpl(Window.java:2746)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[info@…]

Markermeer, showing some nodes of a way that isn't shown.