Signature info is not rendered in viewer

[melentiev-e]

Hello!
There is a problem with rendering electronic signature info:

Configuration:

• Web browser and its version: Chrome 80.0.3987.106
• Operating system and its version: Windows 10 (1909)
• PDF.js version: PDF.js: 2.4.370
• Is a browser extension: no

Steps to reproduce the problem:

1. open demo page http://mozilla.github.io/pdf.js/web/viewer.html
2. upload file from attachment тест(1).pdf

Expected behavior:
there is signature at the left-bottom corner
screenshot from Chrome PDF viewer extention:

What went wrong:
there is no signature info at the left-bottom corner in pdf.js viewer:

It is possible to fix rendering of signature info?

[Snuffleupagus]

Duplicate of #1076.