diff --git a/make_post_sell/static/js/tag_filter.js b/make_post_sell/static/js/tag_filter.js
index d2d5c55..4d5a657 100644
--- a/make_post_sell/static/js/tag_filter.js
+++ b/make_post_sell/static/js/tag_filter.js
@@ -33,6 +33,18 @@
       return;
     }
 
+    // When the page was loaded with ?tag=<slug>, the server rendered a
+    // SUBSET of products (filtered to that tag). The DOM here doesn't
+    // contain the rest of the shop, so clicking "All" — or another tag —
+    // via in-place filter would only ever toggle what's already visible.
+    // Worse, on the lanes layout (home_layout=2), the unfiltered home is
+    // a different markup entirely (lanes, not flat grid) — only a full
+    // navigation can rebuild it. Bail and let chips navigate normally.
+    const initialParams = new URLSearchParams(window.location.search);
+    if (initialParams.get("tag")) {
+      return;
+    }
+
     const items = grid.querySelectorAll(".serp-item");
 
     function applyFilter(slug) {