duplication not more fluently working (for me)

If I duplicate an ad the profile name input field is filled with my profile name but is greyed out and if I submit the form, I'll get an error that the required profile name doesn't have a value and it gets writable for me to submit a name.
Does any body else have this problem?
duplication
document.getElementById("postad-contactname")
<input id="postad-contactname" class="formcontrol" name="contactName" disabled="disabled" type="text" value="privat" maxlength="30">

accept: ""

accessKey: ""

accessKeyLabel: ""

align: ""

alt: ""

assignedSlot: null

attributes: NamedNodeMap(7) [ id="postad-contactname", name="contactName", class="formcontrol", … ]

autocapitalize: ""

autocomplete: ""

autofocus: false

baseURI: "https://www.kleinanzeigen.de/p-anzeige-bearbeiten.html?adId=2565713321"

checked: false

childElementCount: 0

childNodes: NodeList []

children: HTMLCollection { length: 0 }

classList: DOMTokenList [ "formcontrol" ]

className: "formcontrol"

clientHeight: 42

clientLeft: 1

clientTop: 1

clientWidth: 486

contentEditable: "inherit"

dataset: DOMStringMap(0)

defaultChecked: false

defaultValue: "privat"

dir: ""

dirName: ""

disabled: true

draggable: false

enterKeyHint: ""

files: null

firstChild: null

firstElementChild: null

form: <form id="adForm" action="https://www.kleinanzeige…-anzeige-abschicken.html" method="post">

formAction: "https://www.kleinanzeigen.de/p-anzeige-bearbeiten.html?adId=2565713321"

formEnctype: ""

formMethod: ""

formNoValidate: false

formTarget: ""

height: 0

hidden: false

id: "postad-contactname"

indeterminate: false

inert: false

innerHTML: ""

innerText: ""

inputMode: ""

isConnected: true

isContentEditable: false

jQuery351070695212161878821: Object { events: {…}, handle: handle(e)
 }

labels: NodeList [ label.formgroup-label--unpadded
 ]

lang: ""

lastChild: null

lastElementChild: null

list: null

localName: "input"

max: ""

maxLength: 30

min: ""

minLength: -1

multiple: false

name: "contactName"

namespaceURI: "http://www.w3.org/1999/xhtml"

nextElementSibling: null

nextSibling: null

nodeName: "INPUT"

nodeType: 1

nodeValue: null

nonce: ""

offsetHeight: 44

offsetLeft: 179

offsetParent: <div class="formgroup l-container">

offsetTop: 0

offsetWidth: 488

onabort: null

onanimationcancel: null

onanimationend: null

onanimationiteration: null

onanimationstart: null

onauxclick: null

onbeforeinput: null

onblur: null

oncancel: null

oncanplay: null

oncanplaythrough: null

onchange: null

onclick: null

onclose: null

oncontextmenu: null

oncopy: null

oncuechange: null

oncut: null

ondblclick: null

ondrag: null

ondragend: null

ondragenter: null

ondragexit: null

ondragleave: null

ondragover: null

ondragstart: null

ondrop: null

ondurationchange: null

onemptied: null

onended: null

onerror: null

onfocus: null

onformdata: null

onfullscreenchange: null

onfullscreenerror: null

ongotpointercapture: null

oninput: null

oninvalid: null

onkeydown: null

onkeypress: null

onkeyup: null

onload: null

onloadeddata: null

onloadedmetadata: null

onloadstart: null

onlostpointercapture: null

onmousedown: null

onmousemove: null

onmouseout: null

onmouseover: null

onmouseup: null

onpaste: null

onpause: null

onplay: null

onplaying: null

onpointercancel: null

onpointerdown: null

onpointerenter: null

onpointerleave: null

onpointermove: null

onpointerout: null

onpointerover: null

onpointerup: null

onprogress: null

onratechange: null

onreset: null

onresize: null

onscroll: null

onscrollend: null

onsecuritypolicyviolation: null

onseeked: null

onseeking: null

onselect: null

onselectionchange: null

onselectstart: null

onslotchange: null

onstalled: null

onsubmit: null

onsuspend: null

ontimeupdate: null

ontoggle: null

ontransitioncancel: null

ontransitionend: null

ontransitionrun: null

ontransitionstart: null

onvolumechange: null

onwaiting: null

onwebkitanimationend: null

onwebkitanimationiteration: null

onwebkitanimationstart: null

onwebkittransitionend: null

onwheel: null

outerHTML: '<input id="postad-contactname" name="contactName" class="formcontrol" disabled="disabled" type="text" value="privat" maxlength="30">'

outerText: ""

ownerDocument: HTMLDocument https://www.kleinanzeigen.de/p-anzeige-bearbeiten.html?adId=2565713321

parentElement: <div class="formgroup-input align-top" onclick="showToastMessage()">
parentNode: <div class="formgroup-input align-top" onclick="showToastMessage()">
part: DOMTokenList []

pattern: ""

placeholder: ""

prefix: null

previousElementSibling: null

previousSibling: #text "\n                            "

readOnly: false

required: false

scrollHeight: 42

scrollLeft: 0

scrollLeftMax: 0

scrollTop: 0

scrollTopMax: 0

scrollWidth: 486

selectionDirection: "forward"

selectionEnd: 0

selectionStart: 0

shadowRoot: null

size: 20

slot: ""

spellcheck: false

src: ""

step: ""

style: CSS2Properties(0)

tabIndex: 0

tagName: "INPUT"

textContent: ""

textLength: 6

title: ""

translate: true

type: "text"

useMap: ""

validationMessage: ""

validity: ValidityState { valueMissing: false, typeMismatch: false, patternMismatch: false, … }

value: "privat"

valueAsDate: null

valueAsNumber: NaN

webkitEntries: Array []

webkitdirectory: false

width: 0

willValidate: false

<prototype>: HTMLInputElementPrototype { stepUp: stepUp(), stepDown: stepDown(), checkValidity: checkValidity(), … }
qoomon / userscripts--kleinanzeigen-duplicate-ad

duplication not more fluently working (for me) #1
