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.
render() {
    
    if (this.data.alternativeText) {
      this.container.title = this.data.alternativeText;
    }
    return this.container;
  }
  _getKeyModifier(event) {
    return (
      (navigator.platform.includes("Win") && event.ctrlKey) ||
      (navigator.platform.includes("Mac") && event.metaKey)
    );
  }
  _setEventListener(element, baseName, eventName, valueGetter) {