diff --git a/javascript/clusterize.js b/javascript/clusterize.js
index 5f85b9da0..c5fc92263 100644
--- a/javascript/clusterize.js
+++ b/javascript/clusterize.js
@@ -409,13 +409,17 @@ class Clusterize {
 
     async #insertToDOM() {
         if (!this.options.cluster_height || !this.options.cluster_width) {
+            // We need to fetch a single item so that we can calculate the dimensions
+            // for our list.
             const rows = await this.fetchData(0, 1);
             if (!Array.isArray(rows) || !rows.length) {
-                console.error(`Failed to fetch data for idx range (0, 1)`);
+                // This implies there is no data for this list. Not an error.
+                // Errors should be handled in the fetchData callback, not here.
                 this.#html(this.#generateEmptyRow().join(""));
                 return;
             } else {
                 this.#exploreEnvironment(rows, this.#cache);
+                // Remove the temporary item from the data since we calculated its size.
                 this.#html(this.#generateEmptyRow("Loading...").join(""));
             }
         }
diff --git a/javascript/extraNetworks.js b/javascript/extraNetworks.js
index 684a71889..1a3e1fc1b 100644
--- a/javascript/extraNetworks.js
+++ b/javascript/extraNetworks.js
@@ -427,7 +427,10 @@ class ExtraNetworksTab {
         const timeout = EXTRA_NETWORKS_REQUEST_GET_TIMEOUT_MS;
         try {
             const response = await requestGetPromise(url, payload, timeout);
-            return response.response;
+            if (response.response.missing_div_ids.length) {
+                console.warn(`Failed to fetch multiple div_ids: ${response.response.missing_div_ids}`);
+            }
+            return response.response.data;
         } catch (error) {
             console.error(JSON.stringify(error));
             return {};
@@ -447,7 +450,10 @@ class ExtraNetworksTab {
         const timeout = EXTRA_NETWORKS_REQUEST_GET_TIMEOUT_MS;
         try {
             const response = await requestGetPromise(url, payload, timeout);
-            return response.response;
+            if (response.response.missing_div_ids.length) {
+                console.warn(`Failed to fetch multiple div_ids: ${response.response.missing_div_ids}`);
+            }
+            return response.response.data;
         } catch (error) {
             console.error(JSON.stringify(error));
             return {};
diff --git a/modules/ui_extra_networks.py b/modules/ui_extra_networks.py
index 194ad4735..31278f8e7 100644
--- a/modules/ui_extra_networks.py
+++ b/modules/ui_extra_networks.py
@@ -901,11 +901,14 @@ def fetch_tree_data(
     page = get_page_by_name(extra_networks_tabname)
 
     res = {}
+    missed = []
     for div_id in div_ids.split(","):
         if div_id in page.tree:
             res[div_id] = page.tree[div_id].html
+        else:
+            missed.append(div_id)
 
-    return JSONResponse(res)
+    return JSONResponse({"data": res, "missing_div_ids": missed})
 
 
 def fetch_cards_data(
@@ -924,11 +927,14 @@ def fetch_cards_data(
     page = get_page_by_name(extra_networks_tabname)
 
     res = {}
+    missed = []
     for div_id in div_ids.split(","):
         if div_id in page.cards:
             res[div_id] = page.cards[div_id].html
+        else:
+            missed.append(div_id)
 
-    return JSONResponse(res)
+    return JSONResponse({"data": res, "missing_div_ids": missed})
 
 
 def init_cards_data(tabname: str = "", extra_networks_tabname: str = "") -> JSONResponse: