Attach (recommended) or Link to PDF file here:
[docOficialPDF.php.pdf](https://github.com/mozilla/pdf.js/files/7159923/docOficialPDF.php.pdf)

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: linux debian
- PDF.js version: built-in viewer
- Is a browser extension: no

Steps to reproduce the problem:
1. Open the pdf page 2
2. Checkbox "Alta" in section 2 must be checked

It works fine with evince.
element.name = this.data.fieldName;
      element.tabIndex = DEFAULT_TAB_INDEX;
      elementData.userValue = textContent;
      element.setAttribute("id", id);
      element.addEventListener("input", event => {
        storage.setValue(id, { value: event.target.value });
        this.setPropertyOnSiblings(
          element,
          "value",
          event.target.value,
          "value"
        );
      });
      let blurListener = event => {
        if (elementData.formattedValue) {
          event.target.value = elementData.formattedValue;
        }
        
        event.target.scrollLeft = 0;
        elementData.beforeInputSelectionRange = null;
      };
      if (this.enableScripting && this.hasJSActions) {
        element.addEventListener("focus", event => {
          if (elementData.userValue) {
            event.target.value = elementData.userValue;
          }
        });
        element.addEventListener("updatefromsandbox", jsEvent => {
          const actions = {
            value(event) {