Attach (recommended) or Link to PDF file here:
[multiple.pdf](https://github.com/mozilla/pdf.js/files/6344777/multiple.pdf)

Steps to reproduce the problem:
1. Write something in a field

What is the expected behavior? (add screenshot)
The 3 fields must have the same value

What went wrong? (add screenshot)
The 2 other fields are empty

The three fields share the same name `Text3`.
It works as expected in Adobe and Chrome.
const BACKGROUND_ENLIGHT = 0.7;
    const wrapper = document.createElement("div");
    wrapper.className = "popupWrapper";
    
    
    
    
    this.hideElement = this.hideWrapper ? wrapper : this.container;
    this.hideElement.hidden = true;
    const popup = document.createElement("div");
    popup.className = "popup";
    const color = this.color;
    if (color) {
      
      const r = BACKGROUND_ENLIGHT * (255 - color[0]) + color[0];
      const g = BACKGROUND_ENLIGHT * (255 - color[1]) + color[1];
      const b = BACKGROUND_ENLIGHT * (255 - color[2]) + color[2];
      popup.style.backgroundColor = Util.makeHexColor(r | 0, g | 0, b | 0);
    }
    const title = document.createElement("h1");
    title.textContent = this.title;
    popup.appendChild(title);
    
    
    
    const dateObject = PDFDateString.toDateObject(this.modificationDate);
    if (dateObject) {
      const modificationDate = document.createElement("span");
      modificationDate.textContent = "{{date}}, {{time}}";
      modificationDate.dataset.l10nId = "annotation_date_string";