SUMMARY According to https://github.com/KDE/krita/blob/3271766dd7ee96a16fdd4c80ed1a90f8f487ebdd/libs/ui/kis_selection_actions_panel.cpp#L148 , an event filter is always installed that intercepts input in a certain area of the canvas, no matter if the bar is currently visible or disabled completely in the settings. As a result, strokes in that region fail silently, nothing is painted on the canvas. STEPS TO REPRODUCE 1. Enable the selection action bar (just so you can visually see where the drag handle is). 2. Make a selection and remember the position of a drag handle. 3. Deselect. The bar would disappear. 4. Try drawing starting from the location where the drag handle was. 5. Observe that no stroke is produced on the canvas. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION