Attach (recommended) or Link to PDF file here:
[0 NIF MODELO 30.pdf](https://github.com/mozilla/pdf.js/files/7187486/0.NIF.MODELO.30.2.pdf)

Configuration:
- Web browser and its version: firefox nightly
- Operating system and its version: linux debian

Steps to reproduce the problem:
1. Open the PDF
2. Click on the button  `Rellenar Formulario` (top right of the first page)
3. There is the pop-up "Stay... or Leave...`.

It's a bit annoying from the user pov and it doesn't make sense (nobody wants to leave the form but just reset it)

It works fine when replacing  `""` by `"#"` here:
https://github.com/mozilla/pdf.js/blob/7082ff9bf876b98fbda118cdbd6267d3c0df6948/src/display/annotation_layer.js#L483

@Snuffleupagus, you changed this few month ago:
https://github.com/mozilla/pdf.js/commit/e2b6d79dee9ffd2aba715d6b3cb8fa143d86153c

do you have some ideas ?
const storage = this.annotationStorage;
    const id = this.data.id;
    this.container.className = "textWidgetAnnotation";
    let element = null;
    if (this.renderForms) {
      
      
      
      const storedData = storage.getValue(id, {
        value: this.data.fieldValue,
        valueAsString: this.data.fieldValue,
      });
      const textContent = storedData.valueAsString || storedData.value || "";
      const elementData = {
        userValue: null,
        formattedValue: null,
        beforeInputSelectionRange: null,
        beforeInputValue: null,
      };
      if (this.data.multiLine) {
        element = document.createElement("textarea");
        element.textContent = textContent;
      } else {
        element = document.createElement("input");
        element.type = "text";
        element.setAttribute("value", textContent);