Text Overlapping in Certain EPUB Files

[thetalhaamjad]

SumatraPDF version

• v3.5.2 (64-bit)

Bug Description:
When viewing certain EPUB files in SumatraPDF, the first line of text overlaps the second and third lines in the document. This overlap causes the text to appear jumbled in those specific lines. The problem only occurs with some EPUB files—most EPUBs display correctly, and other file formats (e.g., PDF and DjVu) are unaffected.

To Reproduce the Bug:
Steps to reproduce the behavior:

1. Open the EPUB file that shows the bug.
2. Navigate to the beginning of any chapter.
3. Observe the rendering issue in the first 3 lines.

Expected Behavior:
Lines of text should be spaced normally.

File that Reproduces the Problem:
I've emailed it to Krzysztof Kowalczyk at [[email protected]] because attaching EPUB files is not supported on GitHub.

Screenshot(s):
This is how the error is rendered: