SUMMARY When the process table is set to tree mode, line charts only display text. STEPS TO REPRODUCE 1. Open process page 2. Ensure CPU usage is set to line chart mode (does not matter if normalized) 3. Ensure tree mode is active OBSERVED RESULT Only text in CPU column. EXPECTED RESULT Line chart in addition to text in CPU column, like in list mode. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.21.5 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Also happens on git master.