diff --git a/internal/gui/assets/app.js b/internal/gui/assets/app.js
index 75036f3a..8a0a3b11 100644
--- a/internal/gui/assets/app.js
+++ b/internal/gui/assets/app.js
@@ -585,8 +585,9 @@ function toggleProfile(chip, p) {
 }
 
 // closeProfileDetail closes the details shown, if any: false if none were.
+// Details on the page close whether or not profileOpen still names them.
 function closeProfileDetail() {
-  if (!profileOpen) return false;
+  if (!profileOpen && !$("#profiles > .prof-detail")) return false;
   profileOpen = null;
   $("#profiles > .prof-detail")?.remove();
   $(".profiles").classList.remove("detailed");
@@ -2511,7 +2512,10 @@ async function profileAction(action, name, update) {
     state = data;
     renderAgents();
     if (action === "use") {
-      profileOpen = null;
+      // the details close, renderAgents having drawn them again (#489:
+      // profileOpen dropped first, closeProfileDetail found nothing open and
+      // left them there, their × doing nothing)
+      closeProfileDetail();
       closeProfiles(); // the agents, as they are now, in sight
       let msg = t(data.changed === 1 ? "{name} applied · {n} setting changed" : "{name} applied · {n} settings changed", { name, n: data.changed });
       const lib = data.library;
diff --git a/internal/gui/tests/README.md b/internal/gui/tests/README.md
index f927004c..56230a10 100644
--- a/internal/gui/tests/README.md
+++ b/internal/gui/tests/README.md
@@ -357,8 +357,9 @@ chip's ↻ and × change nothing on a first click, reading "Overwrite?" and
 "Delete?" instead, and act on a second; the question goes on Escape or when
 left alone. The details' × closes them, the chip staying where it is; Escape
 closes the details, then the panel's list, and only then hides the panel;
-the list closed with the details open opens again on the chips alone, as
-after Apply. In Chromium and WebKit, English and Chinese:
+the list closed with the details open opens again on the chips alone; Apply
+closes the details, the tray's list opening again on the chips, and their ×
+closes them after it (#489). In Chromium and WebKit, English and Chinese:
 
 ```sh
 node --test --test-concurrency=1 internal/gui/tests/profile-details.test.cjs internal/gui/tests/panel-profiles.test.cjs internal/gui/tests/profile-confirm.test.cjs
diff --git a/internal/gui/tests/profile-confirm.test.cjs b/internal/gui/tests/profile-confirm.test.cjs
index 54a7e708..7b7c27eb 100644
--- a/internal/gui/tests/profile-confirm.test.cjs
+++ b/internal/gui/tests/profile-confirm.test.cjs
@@ -163,6 +163,30 @@ for (const engine of (process.env.BROWSER ? [process.env.BROWSER] : ["chromium",
           assert.equal(await detail.count(), 0, "closed with the list, the details stay closed");
           assert.equal(await home.getAttribute("aria-expanded"), "false");
         } else assert.deepEqual(calls, []);
+
+        // Apply closes the details, for good, and × works after it (#489:
+        // the details stayed, or came back with the list, and their × did
+        // nothing)
+        calls.length = 0; // in the panel, the list is open from above
+        await homeName.click();
+        await detail.waitFor();
+        await detail.locator(".pd-apply").click();
+        await page.waitForFunction(() => document.querySelector("#status").classList.contains("ok"));
+        assert.deepEqual(calls, ["use home"]);
+        await page.waitForTimeout(200);
+        assert.equal(await detail.count(), 0, "Apply closes the details");
+        assert.equal(await home.getAttribute("aria-expanded"), "false");
+        if (panel) {
+          assert.equal(await open.count(), 0, "Apply closes the panel's list");
+          await openList();
+          assert.equal(await detail.count(), 0, "after Apply the list opens on the chips");
+        }
+        await homeName.click();
+        await detail.waitFor();
+        await detail.locator(".pd-close").click();
+        await page.waitForTimeout(200);
+        assert.equal(await detail.count(), 0, "after Apply the details' × still closes them");
+        assert.equal(await home.getAttribute("aria-expanded"), "false");
         assert.deepEqual(errors, []);
       });
     }