A download file name becomes garbled with some browser when the "filename" parameter contains specific multi-byte characters even if the "filename*" parameter is specified correctly in the "Content-Disposition" response header in JBoss EAP 7

Issue

A download file name becomes garbled in some browsers (firefox) when the filename parameter of the Content-Disposition: attachment response header contains specific multi-byte characters (Japanese kanji character 一 or full-width space 　 like the following example code). The issue happens even if the filename* parameter is specified correctly with URL encoded strings in the Content-Disposition: attachment response header:

String filename = "テストファイル一覧.xls";
response.setHeader("Content-disposition","attachment; filename=\"" + filename + "\"; filename*=UTF-8''" + java.net.URLEncoder.encode(filename, "UTF-8"));