Attach (recommended) or Link to PDF file here:
[mytestfile.pdf](https://github.com/mozilla/pdf.js/files/7190033/mytestfile.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 yellow area

What is the expected behavior? (add screenshot)
The text layout should be RTL.

What went wrong? (add screenshot)
The text layout is LTR.

It works correctly in evince and in acrobat.
I added a `dir="rtl"` on the `p` element in using devtools and the rendering is the same as in acrobat.

constructor() {
    this._objs = Object.create(null);
  }
  /**
   * Ensures there is an object defined for `objId`.
   * @private
   */
  _ensureObj(objId) {
    if (this._objs[objId]) {
      return this._objs[objId];
    }
    return (this._objs[objId] = {
      capability: createPromiseCapability(),
      data: null,
      resolved: false,
    });
  }
  /**
   * If called *without* callback, this returns the data of `objId` but the
   * object needs to be resolved. If it isn't, this method throws.
   *
   * If called *with* a callback, the callback is called with the data of the
   * object once the object is resolved. That means, if you call this method
   * and the object is already resolved, the callback gets called right away.
   */
  get(objId, callback = null) {