Attach (recommended) or Link to PDF file here:
[test2-3.pdf](https://github.com/mozilla/pdf.js/files/7881930/test2-3.pdf)

Configuration:
- Web browser and its version: Chrome and Version 93.0.4577.63
- Operating system and its version: Ubuntu 20.04.1 LTS
- PDF.js version: v2.12.313
- Is a browser extension: No

What is the expected behavior? 
![Screenshot from 2022-01-17 18-21-02](https://user-images.githubusercontent.com/29357161/149772453-5906d92a-7cf5-458f-8315-695d78aa9674.png)


What went wrong? 
![Screenshot from 2022-01-17 18-20-24](https://user-images.githubusercontent.com/29357161/149772465-07dd71ef-5d41-42c9-8b13-466f8eee116a.png)


Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):
https://mozilla.github.io/pdf.js/web/viewer.html

const numArgs = this.stack.pop();
              if (subrNumber === 0 && numArgs === 3) {
                const flexArgs = this.stack.splice(this.stack.length - 17, 17);
                this.stack.push(
                  flexArgs[2] + flexArgs[0], 
                  flexArgs[3] + flexArgs[1], 
                  flexArgs[4], 
                  flexArgs[5], 
                  flexArgs[6], 
                  flexArgs[7], 
                  flexArgs[8], 
                  flexArgs[9], 
                  flexArgs[10], 
                  flexArgs[11], 
                  flexArgs[12], 
                  flexArgs[13], 
                  flexArgs[14] 
                  
                  
                );
                error = this.executeCommand(13, COMMAND_MAP.flex, true);
                this.flexing = false;
                this.stack.push(flexArgs[15], flexArgs[16]);
              } else if (subrNumber === 1 && numArgs === 0) {
                this.flexing = true;
              }
              break;
            case (12 << 8) + 17: 
              
              break;