diff --git a/packages/app/src/Element/SubDebug.tsx b/packages/app/src/Element/SubDebug.tsx
index 5ce1d17f..73375741 100644
--- a/packages/app/src/Element/SubDebug.tsx
+++ b/packages/app/src/Element/SubDebug.tsx
@@ -30,10 +30,10 @@ function Queries() {
     return total;
   }
 
-  function queryInfo(q: { id: string; filters: Array<ReqFilter>; closing: boolean; subFilters: Array<ReqFilter> }) {
+  function queryInfo(q: { id: string; filters: Array<ReqFilter>; subFilters: Array<ReqFilter> }) {
     return (
       <div key={q.id}>
-        {q.closing ? <s>{q.id}</s> : <>{q.id}</>}
+        {q.id}
         <br />
         <span onClick={() => copy(JSON.stringify(q.filters))} className="pointer">
           &nbsp; Filters: {q.filters.length} ({countElements(q.filters)} elements)
diff --git a/packages/app/src/Hooks/useRequestBuilder.tsx b/packages/app/src/Hooks/useRequestBuilder.tsx
index 04923ed3..6d2fb8a7 100644
--- a/packages/app/src/Hooks/useRequestBuilder.tsx
+++ b/packages/app/src/Hooks/useRequestBuilder.tsx
@@ -12,6 +12,7 @@ const useRequestBuilder = <TStore extends NoteStore, TSnapshot = ReturnType<TSto
     if (rb) {
       const q = System.Query<TStore>(type, rb);
       const release = q.feed.hook(onChanged);
+      q.uncancel();
       return () => {
         q.cancel();
         release();
diff --git a/packages/app/src/System/NostrSystem.ts b/packages/app/src/System/NostrSystem.ts
index 925fc35e..a34a641f 100644
--- a/packages/app/src/System/NostrSystem.ts
+++ b/packages/app/src/System/NostrSystem.ts
@@ -122,7 +122,9 @@ export class NostrSystem extends ExternalStore<SystemSnapshot> implements System
   Query<T extends NoteStore>(type: { new (): T }, req: RequestBuilder): Query {
     const existing = this.Queries.get(req.id);
     if (existing) {
-      const filters = req.buildDiff(this.#relayCache, existing.filters);
+      const filters = !req.options?.skipDiff
+        ? req.buildDiff(this.#relayCache, existing.filters)
+        : req.build(this.#relayCache);
       if (filters.length === 0 && !!req.options?.skipDiff) {
         return existing;
       } else {
@@ -138,11 +140,7 @@ export class NostrSystem extends ExternalStore<SystemSnapshot> implements System
       const store = new type();
 
       const filters = req.build(this.#relayCache);
-      const q = new Query(req.id, store);
-      if (req.options?.leaveOpen) {
-        q.leaveOpen = req.options.leaveOpen;
-      }
-
+      const q = new Query(req.id, store, req.options?.leaveOpen);
       this.Queries.set(req.id, q);
       for (const subQ of filters) {
         this.SendQuery(q, subQ).then(qta =>
@@ -222,7 +220,6 @@ export class NostrSystem extends ExternalStore<SystemSnapshot> implements System
         return {
           id: a.id,
           filters: a.filters,
-          closing: a.closing,
           subFilters: [],
         };
       }),
@@ -230,12 +227,12 @@ export class NostrSystem extends ExternalStore<SystemSnapshot> implements System
   }
 
   #cleanup() {
-    const now = unixNowMs();
     let changed = false;
     for (const [k, v] of this.Queries) {
-      if (v.closingAt && v.closingAt < now) {
+      if (v.canRemove()) {
         v.sendClose();
         this.Queries.delete(k);
+        this.#log("Deleted query %s", k);
         changed = true;
       }
     }
diff --git a/packages/app/src/System/Query.ts b/packages/app/src/System/Query.ts
index b6e14700..581d37f1 100644
--- a/packages/app/src/System/Query.ts
+++ b/packages/app/src/System/Query.ts
@@ -120,12 +120,12 @@ export class Query implements QueryBase {
   /**
    * Leave the query open until its removed
    */
-  leaveOpen = false;
+  #leaveOpen = false;
 
   /**
    * Time when this query can be removed
    */
-  #cancelTimeout?: number;
+  #cancelAt?: number;
 
   /**
    * Timer used to track tracing status
@@ -140,18 +140,15 @@ export class Query implements QueryBase {
   #log = debug("Query");
   #allFilters: Array<ReqFilter> = [];
 
-  constructor(id: string, feed: NoteStore) {
+  constructor(id: string, feed: NoteStore, leaveOpen?: boolean) {
     this.id = id;
     this.#feed = feed;
+    this.#leaveOpen = leaveOpen ?? false;
     this.#checkTraces();
   }
 
-  get closing() {
-    return this.#cancelTimeout !== undefined;
-  }
-
-  get closingAt() {
-    return this.#cancelTimeout;
+  canRemove() {
+    return this.#cancelAt !== undefined && this.#cancelAt < unixNowMs();
   }
 
   /**
@@ -174,8 +171,15 @@ export class Query implements QueryBase {
     }
   }
 
+  /**
+   * This function should be called when this Query object and FeedStore is no longer needed
+   */
   cancel() {
-    this.#cancelTimeout = unixNowMs() + 5_000;
+    this.#cancelAt = unixNowMs() + 5_000;
+  }
+
+  uncancel() {
+    this.#cancelAt = undefined;
   }
 
   cleanup() {
@@ -203,7 +207,7 @@ export class Query implements QueryBase {
   eose(sub: string, conn: Readonly<Connection>) {
     const qt = this.#tracing.find(a => a.id === sub && a.connId === conn.Id);
     qt?.gotEose();
-    if (!this.leaveOpen) {
+    if (!this.#leaveOpen) {
       qt?.sendClose();
     }
   }
@@ -272,6 +276,7 @@ export class Query implements QueryBase {
     c.QueueReq(["REQ", qt.id, ...q.filters], () => qt.sentToRelay());
     return qt;
   }
+
   #reComputeFilters() {
     console.time("reComputeFilters");
     this.#allFilters = flatMerge(this.#tracing.flatMap(a => a.filters).flatMap(expandFilter));
diff --git a/packages/app/src/System/RequestMerger.ts b/packages/app/src/System/RequestMerger.ts
index 0a4ba5e1..bd588c25 100644
--- a/packages/app/src/System/RequestMerger.ts
+++ b/packages/app/src/System/RequestMerger.ts
@@ -7,7 +7,7 @@ import { distance } from "./Util";
  */
 const DiscriminatorKeys = ["since", "until", "limit", "search"];
 
-export function canMergeFilters(a: FlatReqFilter, b: FlatReqFilter): boolean {
+export function canMergeFilters(a: FlatReqFilter | ReqFilter, b: FlatReqFilter | ReqFilter): boolean {
   const aObj = a as Record<string, string | number | undefined>;
   const bObj = b as Record<string, string | number | undefined>;
   for (const key of DiscriminatorKeys) {
@@ -17,34 +17,21 @@ export function canMergeFilters(a: FlatReqFilter, b: FlatReqFilter): boolean {
       }
     }
   }
-  const keys1 = Object.keys(aObj);
-  const keys2 = Object.keys(bObj);
-  const maxKeys = keys1.length > keys2.length ? keys1 : keys2;
-
-  let distance = 0;
-  for (const key of maxKeys) {
-    if (key in aObj && key in bObj) {
-      if (aObj[key] !== bObj[key]) {
-        distance++;
-      }
-    } else {
-      return false;
-    }
-  }
-  return distance <= 1;
+  return distance(aObj, bObj) <= 1;
 }
 
 export function mergeSimilar(filters: Array<ReqFilter>): Array<ReqFilter> {
   console.time("mergeSimilar");
   const ret = [];
 
-  while (filters.length > 0) {
-    const current = filters.shift()!;
+  const fCopy = [...filters];
+  while (fCopy.length > 0) {
+    const current = fCopy.shift()!;
     const mergeSet = [current];
-    for (let i = 0; i < filters.length; i++) {
-      const f = filters[i];
+    for (let i = 0; i < fCopy.length; i++) {
+      const f = fCopy[i];
       if (mergeSet.every(v => canMergeFilters(v, f))) {
-        mergeSet.push(filters.splice(i, 1)[0]);
+        mergeSet.push(fCopy.splice(i, 1)[0]);
         i--;
       }
     }
diff --git a/packages/app/src/System/index.ts b/packages/app/src/System/index.ts
index 46be1f89..fd40e81e 100644
--- a/packages/app/src/System/index.ts
+++ b/packages/app/src/System/index.ts
@@ -38,7 +38,6 @@ export interface SystemSnapshot {
     id: string;
     filters: Array<ReqFilter>;
     subFilters: Array<ReqFilter>;
-    closing: boolean;
   }>;
 }