media_url_resolver invalid after dimensions changed

[axww]

Sample code on https://fiddle.tiny.cloud/

<script type="text/javascript">
  tinymce.init({
    selector: "textarea",
    plugins: ["media"],
    toolbar: "media",
    media_url_resolver: (data) => {
      return new Promise((resolve) => {
        if (data.url.indexOf('a.com') !== -1) {
          resolve({ html: `<iframe src="z.com" width="400" height="400" ></iframe>` });
        } else {
          resolve({ html: '' });
        }
      });
    }
  });
</script>
<form method="post" action="dump.php"><textarea name="content"></textarea></form>

📝 Provide detailed reproduction steps (if any)

1. Click "Media" button.
2. Input "a.com" in "Source" box.
3. Switch to "Embed" card, the code in "Embed" should be:
   <iframe src="z.com" width="400" height="400" ></iframe>
4. Back to "General" card, change dimensions to different value. (Eg. width/height: 500)
5. Switch to "Embed" card again, the code in "Embed" becoming:
   <iframe src="a.com" width="500" height="500"></iframe>

✔️ Expected result

Even dimensions changed, the code in "Embed" should be:
<iframe src="z.com" width="500" height="500"></iframe>

❌ Actual result

Iframe src did not change to z.com after dimensions changed.
Only the first time input without dimensions change did the correct url resolve.

📃 Other details

• Browser: Microsoft Edge 122.0.2365.92
• OS: Windows 11
• First affected version: TinyMCE 6
• Worked in version: TinyMCE 7.0.0

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