Created attachment 137839 [details] This is a screenshot of the bug, it's hard to explain how it happens, it's a transparency break on the top left corner over the "Contents" label. SUMMARY STEPS TO REPRODUCE 1. Using Edna theme and transparency (maybe it happens without Edna also) 2. Opening this PDF, it doesn't seem to happen with other PDFs 3. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: 5.10.30-1-MANJARO (available in About System) KDE Plasma Version: 5.21.4 KDE Frameworks Version: 5.81.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION
This would be an issue in the theme itself. You would want to contact its developer about it.
Left of the visible tabs should be the Thumbnails tab. So, I’d say, the blue stripe is the IndicatorTabTearLeft GUI primitive: https://doc.qt.io/qt-5/qstyle.html#PrimitiveElement-enum . It could also be the intended result.