ImportImagePlugin does install geotools but not its dependency plugin jts

[skyper]

1. start JOSM with empty preference directory
2. download plugin list in plugin preferences.
3. select "utilsplugin2" and "ImportImagePlugin"
4. four plugins (utilsplugin2,ImportImagePlugin,log4j,geotools) are downloaded.
5. restart JOSM
6. jts is missing for geotools

lade Plugin 'log4j' (Version 28968)
lade Plugin 'ImportImagePlugin' (Version 28969)
Logging properties file not found. Using standard settings.
org.openstreetmap.josm.plugins.PluginException: Ein Fehler ist in dem Plugin ImportImagePlugin aufgetreten.
	at org.openstreetmap.josm.plugins.PluginInformation.load(PluginInformation.java:308)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugin(PluginHandler.java:508)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugins(PluginHandler.java:566)
	at org.openstreetmap.josm.plugins.PluginHandler.loadLatePlugins(PluginHandler.java:605)
	at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:348)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
	at org.openstreetmap.josm.plugins.PluginInformation.load(PluginInformation.java:299)
	... 4 more
Caused by: java.lang.NoClassDefFoundError: org/opengis/referencing/FactoryException
	at org.openstreetmap.josm.plugins.ImportImagePlugin.ImportImagePlugin.<init>(ImportImagePlugin.java:90)
	... 9 more
Caused by: java.lang.ClassNotFoundException: org.opengis.referencing.FactoryException
	at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
	... 10 more

• Installing plugin jts solves the problem.
• Installing plugin geotools only properly pulls jts.
• I also noticed that downloading the plugin geotools takes quite long.