assistant.css

@@ -18,6 +18,8 @@
    bottom-right, so move the assistant to the bottom-left there. */
 .msa-root.msa-left { right: auto; left: 20px; }
 .msa-root.msa-left .msa-panel { right: auto; left: 0; }
+/* Hidden while a bottom overlay (cookie consent / language banner) is up. */
+.msa-root.msa-hidden { display: none !important; }
 
 /* launcher */
 .msa-launch {

assistant.js

@@ -321,6 +321,19 @@
         root.querySelector(".msa-x").addEventListener("click", close);
         root.querySelector(".msa-form").addEventListener("submit", function (e) { e.preventDefault(); submit(); });
         document.addEventListener("keydown", function (e) { if (e.key === "Escape" && opened) close(); });
+
+        // Yield to bottom-anchored overlays (cookie-consent banner, language
+        // banner) so the launcher never sits on top of their action buttons —
+        // important in in-app browsers (Instagram/Facebook) where everything
+        // stacks at the bottom. The pill reappears once they are dismissed.
+        (function () {
+            function overlayUp() {
+                return !!document.querySelector(".msos-cc") || !!document.querySelector(".lang-suggest");
+            }
+            function sync() { root.classList.toggle("msa-hidden", overlayUp()); }
+            try { new MutationObserver(sync).observe(document.body, { childList: true }); } catch (e) {}
+            sync();
+        })();
     }
 
     if (document.readyState !== "loading") build();

css/components/_lang-banner.css

@@ -56,9 +56,9 @@
     .lang-suggest {
         left: 16px;
         right: 16px;
-        /* sit above the floating "Ask MSOS" pill (bottom-right, z-index above
+        /* The Ask-MSOS pill now hides while this banner is up (see assistant.js),
-           this banner) so it never covers the dismiss (×) button */
+           so the banner can sit at the bottom without colliding with it. */
-        bottom: 84px;
+        bottom: 16px;
         transform: translateY(24px);
         flex-wrap: wrap;
     }