pdf source code：
src.zip (4.4 KB)
origin pdf:
附后文件 (1).pdf.zip (3.9 MB)
converted problem:
before converted:
converted before.jpg (257.6 KB)
after converted:
converted after.jpg (272.5 KB)
It changed to be yellow backgroud,please have a check.
Could you please share your working environment e.g. operating system, Java version etc.? Please also share the page number of PDF that does not render correctly. We will investigate the issue and provide you more information on it.