After loading any Pdf some letters are covered in white and its fixed after Zooming

Which product are you using?
{PDF.js Express Plus}

PDF.js Express Version

Detailed description of issue
{After loading a document, the letters are not displayed correctly and are partially covered with white. If I zoom in and then out again, the document is displayed correctly in the viewer again.}

Expected behaviour
{The document should load without problems so that each letter is readable}

Does your issue happen with every document, or just one?
{This issue happens in multiple documents}

Link to document

Code snippet
{ if (instance === undefined) {
const newInstance = await WebViewer({
path: ‘/pdfjsexpress’, // path to the PDFTron ‘lib’ folder on your server
initialDoc: ‘’
}, viewerDiv.current as HTMLDivElement);
} else {
if (IsThemeDark()) {
else {
const { documentViewer, annotationManager } = instance.Core;

Hello tw1,

This is actually a Chrome issue we have encountered previously, you can see a bug report was created here:

There was a possible fix that we haven’t been able to verify, but if you access the canvas that is rendering the page and add “willReadFrequently: true” it could work

Best regards,
Tyler Gordon