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because these are our editor plugins.. and i saw you disabled so many plugins there :)
i have been enabled this 3 plugins and i tested your website the description field is appear and work perfectly :)
i can;t say about another plugins, just for your info, you must enable all default jomsocial default which has been enabled before.. as example Editor - CodeMirror plugins was enabled by default when you first install jomsocial but you disabled it..