Created attachment 120489 [details] screenshot SUMMARY When I view certain pdfs with okular using the trim margin and facing pages feature, some regions of the pdf don't render and just appear white. See attached screenshot of this pdf: https://docs.kde.org/trunk5/en/applications/fundamentals/fundamentals.pdf This seems to only occur when the okular window is at least ~3000 pixels wide; eg, a fullscreen okular window has this issue on my 4k screen. STEPS TO REPRODUCE 1. Open https://docs.kde.org/trunk5/en/applications/fundamentals/fundamentals.pdf 2. Make okular window at least ~3000 pixels wide. 3. Enable trim margin 4. Use facing pages OBSERVED RESULT Large unrendered region, as seen in screenshot. EXPECTED RESULT Everything should be rendered. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 5.1.5 (available in About System) KDE Plasma Version: 5.15.5 KDE Frameworks Version: 5.58 Qt Version: 5.12.3