[sebras]

Do you mind reporting those issues either to SumatraPDF at https://github.com/sumatrapdfreader/sumatrapdf/issues or directly to MuPDF at https://bugs.ghostscript.com/ if it also has the same issue? Thank you!

There are many wonderfully weird PDFs and epubs out there, but we do our best to fix issues. :)

[quyleanh]

Thank you for reaching out. Please refer to the following issue list from SumatraPDF repo [1] [2]. Epub rendering issue like [3] [4].

[1] https://github.com/sumatrapdfreader/sumatrapdf/issues?q=is%3...

[2] https://github.com/sumatrapdfreader/sumatrapdf/issues?q=is%3...

[3] https://github.com/sumatrapdfreader/sumatrapdf/issues/2752

[4] https://github.com/sumatrapdfreader/sumatrapdf/issues/3761