CombinedConfiguration: java.util.NoSuchElementException after reload of enclosed SubnodeConfiguration/XMLConfiguration

Steps to repeat:

• create a XMLConfiguration based on a XML config file (xml file content e.g.: <config><foo><bar>0</bar></for></config>)
• assign file reloading strategy to the XMLConfiguration
• create a SubnodeConfiguration based on this XMLConfiguration (prefix e.g.: 'foor')
• create a CombinedConfiguration
• add the SubnodeConfiguration to this CombinedConfiguration
• get a configuration value from the CombinedConfiguration (e.g. 'bar') -> OK, this works
• touch the underlying xml configuration
• try to get a configuration value from the CombinedConfiguration again (e.g. 'bar') -> java.util.NoSuchElementException

See also attached TestCase.