Wrong Content-Rotation but Page-Rotation is ok

PDF.js Express Viewer

8.7.2

I have a pdf with one page. If I load the page with Acrobat Reader or Google Chrome Webviewer the rotation of the page an the rotation of the content is both portrait. On loading the page with pfdjs.express the rotation of the page is portrait, but content is rotated 90 degrees.
{Description here}

correct rotation, content AND page should have the same rotation
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some documents
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IMG_7784.pdf (567.6 KB)
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PDF.js Express Viewer

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Hello ludwig.pfefferkorn,

Thank you for reporting this! This is an interesting case of PDFJS not taking into the page rotation.
We have added this to our backlog to be reviewed by our product team

Best regards,
Tyler