diff --git a/src/renderer/src/components/TaskPage.tsx b/src/renderer/src/components/TaskPage.tsx
index 04bd6348374..4ca5d1990d2 100644
--- a/src/renderer/src/components/TaskPage.tsx
+++ b/src/renderer/src/components/TaskPage.tsx
@@ -785,14 +785,18 @@ export default function TaskPage(): React.JSX.Element {
     }
   }, [pageData.taskSource])
 
-  // Why: settings.defaultTaskSource can change while Tasks is open (Settings
-  // panel is reachable without unmounting Tasks). The one-shot resume effect
-  // only seeds taskSource on first mount, so without this sync a mid-session
-  // change to the default would not propagate when no explicit page-level
-  // taskSource was passed.
+  // Why: when settings hydrate after Tasks mounts, seed taskSource from
+  // defaultTaskSource — but only once. Re-running on every defaultTaskSource
+  // change would clobber an in-session manual source pick (e.g. the user
+  // clicked the Linear icon and then changed the default in Settings).
+  const defaultTaskSourceSeededRef = useRef(false)
   useEffect(() => {
+    if (defaultTaskSourceSeededRef.current) {
+      return
+    }
     if (!pageData.taskSource && settings?.defaultTaskSource) {
       setTaskSource(settings.defaultTaskSource)
+      defaultTaskSourceSeededRef.current = true
     }
   }, [settings?.defaultTaskSource, pageData.taskSource])