diff --git a/bun.lock b/bun.lock
index da079b8e..9ea8e008 100644
--- a/bun.lock
+++ b/bun.lock
@@ -688,7 +688,7 @@
     },
     "packages/ui": {
       "name": "@wrnexus/ui",
-      "version": "0.8.63",
+      "version": "0.8.64",
       "dependencies": {
         "@wrnexus/core": "workspace:*",
       },
diff --git a/packages/ui/components/AdvancedSelect.wrn b/packages/ui/components/AdvancedSelect.wrn
index 1042c55a..efb5b41a 100644
--- a/packages/ui/components/AdvancedSelect.wrn
+++ b/packages/ui/components/AdvancedSelect.wrn
@@ -304,7 +304,7 @@ component AdvancedSelect {
               aria-label="{selectedOptionsLabel}"
               data-show="multiple && selectedTemplate !== 'count' && selectedTemplate !== 'text' && selectedCount() > 0"
             >
-              {#each allOptions() as option}
+              {#each multiple && selectedTemplate !== 'count' && selectedTemplate !== 'text' ? selectedOptions() : [] as option}
                 <span data-show="isSelected(option)">
                   {#if optionTemplate === "icon" && option.icon}<i class="{option.icon}" aria-hidden="true"></i>{/if}
                   {#if optionTemplate === "avatar" && option.avatar}<img src="{option.avatar}" alt="" />{/if}
@@ -371,7 +371,7 @@ component AdvancedSelect {
               role="listbox"
               aria-multiselectable="{multiple}"
             >
-              {#each groups as group}
+              {#each open ? groups : [] as group}
                 {#if visibleOptions(group.options || []).length}
                   <div class="wrn-next__option-group" role="group" aria-label="{group.label}">
                     <div class="wrn-next__group-label">{group.label}</div>
@@ -402,7 +402,7 @@ component AdvancedSelect {
                 {/if}
               {/each}
 
-              {#each visibleOptions(options) as option}
+              {#each open ? visibleOptions(options) : [] as option}
                 <button
                   type="button"
                   class="wrn-next__select-option {isSelected(option) ? 'wrn-next__select-option--selected' : ''} {optionIndex(option) === activeIndex ? 'wrn-next__select-option--active' : ''}"
diff --git a/packages/ui/package.json b/packages/ui/package.json
index f9590375..5c6c1d91 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@wrnexus/ui",
-  "version": "0.8.63",
+  "version": "0.8.64",
   "private": true,
   "type": "module",
   "main": "src/index.ts",
diff --git a/packages/ui/test/ui.test.ts b/packages/ui/test/ui.test.ts
index de199b4b..f94caeaf 100644
--- a/packages/ui/test/ui.test.ts
+++ b/packages/ui/test/ui.test.ts
@@ -1910,6 +1910,61 @@ test("input number increments, decrements, applies steps, and respects limits",
   expect(decrement().disabled).toBe(true);
 });
 
+test("advanced select keeps large closed lists compact and renders only selected tags", async () => {
+  const source = readFileSync(uiComponentPath("AdvancedSelect"), "utf8");
+  const options = Array.from({ length: 420 }, (_, i) => ({
+    value: String(i),
+    label: "Option " + i,
+  }));
+  const html = await renderComponent(source, {
+    name: "large",
+    value: "419",
+    options,
+    searchResultLimit: 40,
+  });
+  expect(Buffer.byteLength(html)).toBeLessThan(120_000);
+  const dom = mountHtml(html);
+  expect(dom.querySelectorAll(".wrn-next__select-option")).toHaveLength(0);
+  expect(dom.querySelectorAll(".wrn-next__select-tags > span")).toHaveLength(0);
+  expect(dom.querySelector(".wrn-next__select-value")?.textContent).toContain("Option 419");
+  (dom.querySelector(".wrn-next__select-trigger") as HTMLButtonElement).click();
+  expect(dom.querySelectorAll(".wrn-next__select-option")).toHaveLength(40);
+  (dom.querySelector(".wrn-next__select-trigger") as HTMLButtonElement).click();
+  expect(dom.querySelectorAll(".wrn-next__select-option")).toHaveLength(0);
+
+  const multi = mountHtml(
+    await renderComponent(source, {
+      name: "selected-tags",
+      multiple: true,
+      values: ["419"],
+      options,
+      searchResultLimit: 4,
+    }),
+  );
+  expect(multi.querySelectorAll(".wrn-next__select-tags > span")).toHaveLength(1);
+  expect(multi.querySelector(".wrn-next__select-tags")?.textContent).toContain("Option 419");
+  (multi.querySelector(".wrn-next__select-trigger") as HTMLButtonElement).click();
+  (multi.querySelector(".wrn-next__select-option") as HTMLButtonElement).click();
+  expect(multi.querySelectorAll(".wrn-next__select-tags > span")).toHaveLength(2);
+  (multi.querySelector(".wrn-next__clear-select") as HTMLButtonElement).click();
+  expect(multi.querySelectorAll(".wrn-next__select-tags > span")).toHaveLength(0);
+});
+
+test("advanced select lazily opens grouped options and honors defaultOpen", async () => {
+  const source = readFileSync(uiComponentPath("AdvancedSelect"), "utf8");
+  const groups = [{ label: "Regions", options: [{ value: "in", label: "India" }] }];
+  const dom = mountHtml(await renderComponent(source, { name: "grouped", groups }));
+  expect(dom.querySelectorAll(".wrn-next__option-group")).toHaveLength(0);
+  (dom.querySelector(".wrn-next__select-trigger") as HTMLButtonElement).click();
+  expect(dom.querySelectorAll(".wrn-next__option-group")).toHaveLength(1);
+  (dom.querySelector(".wrn-next__select-option") as HTMLButtonElement).click();
+  expect((dom.querySelector('input[type="hidden"]') as HTMLInputElement).value).toBe("in");
+  const opened = mountHtml(
+    await renderComponent(source, { name: "opened", groups, defaultOpen: true }),
+  );
+  expect(opened.querySelectorAll(".wrn-next__select-option")).toHaveLength(1);
+});
+
 test("advanced select limits rendered options but searches the full dataset and retains saved values", async () => {
   const source = readFileSync(uiComponentPath("AdvancedSelect"), "utf8");
   const dom = mountHtml(
@@ -1921,8 +1976,9 @@ test("advanced select limits rendered options but searches the full dataset and
     }),
   );
   expect(dom.querySelector(".wrn-next__select-value")?.textContent).toContain("Region 99");
-  expect(dom.querySelectorAll(".wrn-next__select-option")).toHaveLength(4);
+  expect(dom.querySelectorAll(".wrn-next__select-option")).toHaveLength(0);
   (dom.querySelector(".wrn-next__select-trigger") as HTMLButtonElement).click();
+  expect(dom.querySelectorAll(".wrn-next__select-option")).toHaveLength(4);
   const search = dom.querySelector('input[type="search"]') as HTMLInputElement;
   search.value = "Region 99";
   search.dispatchEvent(new (dom.window as any).Event("input", { bubbles: true }));