Attach (recommended) or Link to PDF file here:
https://s3.eu-west-1.amazonaws.com/scai-dev.website.com/tmp/8ab8b56a-fa91-11eb-8d74-0242ac110004.pdf

Hi,
Please see an incorrect canvas rendering for the following document - page 9 specifically. It reproduces on https://mozilla.github.io/pdf.js/web/viewer.html (tried with Chrome). Other pages in this document look pretty much the same but the problem is on page 9 only.

Original screenshot:
![image](https://user-images.githubusercontent.com/23075641/129066656-7bb2fb56-2b88-4f40-8e67-b95bdeb9e521.png)


PDF JS:

![image](https://user-images.githubusercontent.com/23075641/129066734-56503a5c-413c-49c1-9e1c-470da3a642ed.png)

if (this.current.resumeSMaskCtx) {
      this.resumeSMaskGroup();
    }
    
    
    if (
      this.current.activeSMask !== null &&
      (this.stateStack.length === 0 ||
        this.stateStack[this.stateStack.length - 1].activeSMask !==
          this.current.activeSMask)
    ) {
      this.endSMaskGroup();
    }
    if (this.stateStack.length !== 0) {
      this.current = this.stateStack.pop();
      this.ctx.restore();
      
      this.pendingClip = null;
      this._cachedGetSinglePixelWidth = null;
    } else {
      
      this.current.activeSMask = null;
    }
  }
  transform(a, b, c, d, e, f) {