reset ptr to false when component is inactive

src/view/com/notifications/NotificationFeed.tsx

@@ -162,6 +162,12 @@ export function NotificationFeed({
     [isFetchingNextPage],
   )
 
+  React.useEffect(() => {
+    if (!enabled) {
+      setIsPTRing(false)
+    }
+  }, [enabled])
+
   return (
     <View style={s.hContentRegion}>
       {error && (

src/view/com/posts/PostFeed.tsx

@@ -683,6 +683,12 @@ let PostFeed = ({
     blockedOrMutedAuthors,
   ])
 
+  useEffect(() => {
+    if (enabled === false) {
+      setIsPTRing(false)
+    }
+  }, [enabled])
+
   // events
   // =