Which product are you using?
PDF.js Express Plus
PDF.js Express Version
8.7.5
Detailed description of issue
Text selection works inaccurate in some PDFs. It causes issues when you try to select such fragments.
It works fine with the attached PDF in PDF.js demo
Here is PDF.js express demo:
Expected behaviour
Selection follows text.
Does your issue happen with every document, or just one?
Some other documents too
Link to document
Page 1
Code snippet
{Provide a relevant code snippet}