1. If you enter Unicode characters, an error occurs. for example The following query results in an error. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ http://redmine:3000/issues?set_filter=1&f[]=project&op[project]==&v[project][]=ANB&f[]=cf_13&op[cf_13]=*~&v[cf_13][]=디지털무역물류플랫폼 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ However, if you enter Korean characters using URL encoding, it works correctly. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ http://redmine:3000/issues?set_filter=1&f[]=project&op[project]==&v[project][]=ANB&f[]=cf_13&op[cf_13]=*~&v[cf_13][]=%EB%94%94%EC%A7%80%ED%84%B8%EB%AC%B4%EC%97%AD%EB%AC%BC%EB%A5%98%ED%94%8C%EB%9E%AB%ED%8F%BC ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2. If you enter '~' character, it disapear input ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [http://redmine:3000/issues?set_filter=1&f[]=project&op[project]==&v[project][]=ANB&f[]=cf_13&op[cf_13]=*~&v[cf_13][]=%EB%94%94%EC%A7%80%ED%84%B8%EB%AC%B4%EC%97%AD%EB%AC%BC%EB%A5%98%ED%94%8C%EB%9E%AB%ED%8F%BC] output ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [http://redmine:3000/issues?set_filter=1&f[]=project&op[project]==&v[project][]=ANB&f[]=cf_13&op[cf_13]=&v[cf_13][]=%EB%94%94%EC%A7%80%ED%84%B8%EB%AC%B4%EC%97%AD%EB%AC%BC%EB%A5%98%ED%94%8C%EB%9E%AB%ED%8F%BC|http://redmine:3000/issues?set_filter=1&f[]=project&op[project]==&v[project][]=ANB&f[]=cf_13&op[cf_13]=~&v[cf_13][]=%EB%94%94%EC%A7%80%ED%84%B8%EB%AC%B4%EC%97%AD%EB%AC%BC%EB%A5%98%ED%94%8C%EB%9E%AB%ED%8F%BC] |