userscript/manga-bookmark.user.js

@@ -554,7 +554,15 @@
       }
       ok = true;
     } catch (e) {
-      queueEnqueue(key, "put", withStatus, e);
+      // Same guard as the success path: a newer write is parked for this key, so
+      // classifying *this* failure would clobber its op or, on a 400, drop it
+      // outright. Its own drain reports its own outcome. The one thing that must
+      // still carry across is sendStatus — this flight may have been the archive
+      // replay, and losing its flag here would narrow the parked write into a
+      // silent un-archive.
+      const parked = inFlight.get(key) ? queueGet(key) : null;
+      if (parked) queueDefer(key, parked.op, withStatus);
+      else queueEnqueue(key, "put", withStatus, e);
     } finally {
       inFlight.delete(key);
     }
@@ -576,7 +584,7 @@
       if (!inFlight.get(key)) queueDrop(key);
       return true;
     } catch (e) {
-      queueEnqueue(key, "delete", false, e);
+      if (!inFlight.get(key)) queueEnqueue(key, "delete", false, e); // see pushBookmark
       return false;
     } finally {
       inFlight.delete(key);