I created the attached PDF with Prince 13.5

https://github.com/zopyx/print-css-rocks/tree/typeset.sh/lessons/lesson-css-gradients

The screenshot file shows the same file on Linux (with "Okular" viewer) in two zoom levels.
The gradients should fully fill the boxes. But depending on the zoom level and preview size, they only fill he boxes partly...anything missing here?

1. Screenshot_20200707_091858.png‎ 358.6 kB
2. prince.pdf‎ 21.2 kB

I have submitted an issue on the poppler bug tracker.
https://gitlab.freedesktop.org/poppler/poppler/-/issues/937