iRule error undefined procedure, that hasn't been reported

I tried to create irule like below (part of the entire code)

"rules": [
                        {
                            "actions": [
                                {
                                    "event": "request",
                                    "location": "http://example.com",
                                    "type": "httpRedirect"
                                }
                            ],
                            "conditions": [
                                {
                                    "all": {
                                        "caseSensitive": false,
                                        "operand": "equals",
                                        "values": [
                                            "examplea&*d;d"
                                        ]
                                    },
                                    "name": "exampleamp",
                                    "type": "httpHeader"
                                }
                            ],
                            "label": "",
                            "name": "l7policy_23430070-92c8-442a-aae5-4503816e6ddb",
                            "remark": ""
                        }
                    ],
                    "strategy": "first-match"

and an error occurs, 

nfv-lb-f5-0.skynet.local	mcpd[6906]	01070712	Caught configuration exception (0), /Common/__appsvcs_update:14: error: [undefined procedure: d][d \} case-insensitive name exampleamp \} \} actions replace-all-with \{ 0 \{ http-reply request redirect location \"http://example.com\" \} \} \} \} strategy /Common/first-match legacy requires replace-all-with \{ http \} controls replace-all-with \{ forwarding \}]

could anyone tell me why this error occurred? After getting this error, I simply changed name (http header key) that starts with Upper Case Letter (ex. My_header) and that one worked just fine. It seems like although the AS3 declaration contains "case-insensitive", somehow f5 cannot handle http header starting with lowercase letter. 

(error happend in two OS version: BIG-IP 13.1.3.6 Build 0.21.4 Engineering Hotfix, BIG-IP 16.1.3.1 Build 0.0.11 Point Release 1)