unicodenormalization filter tries to overwrite orginaluri and orginalurl of aggregationstate.
There are two pitfalls:

1. if the url is sent in nfd and then normalized to nfc by the filter, that tries to set it back on AggregationState using setOriginalUri; but the new url is not equal (nfd -> nfc) to the previous and this will throw an illegalstateexception
2. even if the original uri is nfc, but the contextpath has the same name as the first clean uri token:
   i.e. the uri is http://www.mydomain.com/thename/thename/en/home.html with context path = "/thename" and clean url "/thename/en/home.html"
   • contenttypefilter set originaluri /thename/en/home.html
   • unicodenormalizationfilter tries to overwrite with normalized /thename/en/home.html but the AggregationState.setOriginalUri strips /thename, compares /thename/en/home.html (original) with and /en/home.html and then throws illegalstateexception!