Created attachment 122250 [details] screenshot SUMMARY STEPS TO REPRODUCE 1. Start the Kontact application OBSERVED RESULT The width of the columns is not fixed, always returning to the state in which you cannot read the names of the folders and occupy almost the entire space "Read", "Total", "Size". Even when I delete the columns in the view and redo the size adjustment, when reopening it returns to the initial state. EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION