Node Name with german Character :webdav and rest navigation to this node doesn't work?

Hi,

I create a node that the name contains german character like ä or ü", Nodes are successfully created but when I tray through webdav or rest to navigate to the node. I can't open it because these characters are coded in others characters:

for example using this link for rest : http://localhost:8080/modeshape-rest/orc/orc/items/patients/

I see lines like this:

"4_Claudia_Bächer_1988-12-30":

{ "self": "http://localhost:8080/modeshape-rest/orc/orc/items/patients/4_Claudia_Bächer_1988-12-30", "up": "http://localhost:8080/modeshape-rest/orc/orc/items/patients", "id": "3513269c-dc43-41f5-9792-44c7f2ed754b" }

As you see instead of "Claudia_Bächer" I see something like "Claudia_Bächer" and cliking in the link of "self" I can't navigate there until I correct the link manually, then it works.

using webdav I see the node correctly with the name "4_Claudia_Bächer_1988-12-30" but cliking on it, I get the error "Please check the spelling and try again."

PS: My Browser works correctly with german characters.

Do you have an idea what wrong with the coding, I thought it's UTF-8 supported!