diff --git a/src/social-share-button.js b/src/social-share-button.js
index 2dd6dd57..55ad1294 100644
--- a/src/social-share-button.js
+++ b/src/social-share-button.js
@@ -10,7 +10,10 @@ const ANALYTICS_SCHEMA_VERSION = "1.0";
 class SocialShareButton {
   constructor(options = {}) {
     // Resolve container element early to prevent duplicate instances
-    const containerEl = SocialShareButton._resolveContainer(options.container);
+    const containerEl = SocialShareButton._resolveContainer(
+      options.container,
+      options.debug
+    );
 
     if (containerEl && containerEl._socialShareButtonInstance) {
       return containerEl._socialShareButtonInstance;
@@ -533,7 +536,8 @@ class SocialShareButton {
         copyBtn.classList.remove("copied");
         this.feedbackTimeout = null;
       }, 2000);
-    } catch (_err) {
+    } catch (error) {
+      this._debugWarn("fallbackCopy failed", error);
       copyBtn.textContent = "Failed";
 
       // Clear any existing feedback timeout
@@ -732,10 +736,23 @@ class SocialShareButton {
   // ---------------------------------------------------------------------------
 
   // Resolves a raw container value (string or Element) to a DOM Element, or null if absent/SSR.
-  static _resolveContainer(raw) {
+  
+  static _resolveContainer(raw, debug = false) {
     if (!raw) return null;
     if (typeof document === "undefined") return null;
-    return typeof raw === "string" ? document.querySelector(raw) : raw;
+    if (typeof raw !== "string") return raw;
+  
+    try {
+      return document.querySelector(raw);
+    } catch (error) {
+      if (debug) {
+        // Invalid selectors are only logged when debug mode is enabled.
+        // eslint-disable-next-line no-console
+        console.warn("[SocialShareButton] Invalid container selector:", raw, error);
+      }
+  
+      return null;
+    }
   }
 
   // Returns the cached host container element, or null.
@@ -744,16 +761,16 @@ class SocialShareButton {
   }
 
   /**
-   * Logs analytics warnings only when debug mode is enabled.
-   * @param {string} message - Description of the failed analytics path.
-   * @param {Error} err - The caught error instance.
-   */
-  _debugWarn(message, err) {
-    // _debugWarn: emit analytics warnings only in debug mode for visibility.
-    if (!this.options.debug) return;
-    // eslint-disable-next-line no-console
-    console.warn("[SocialShareButton Analytics]", message, err);
-  }
+ * Logs debug warnings only when debug mode is enabled.
+ * @param {string} message - Warning message.
+ * @param {Error} err - The caught error instance.
+ */
+_debugWarn(message, err) {
+  if (!this.options.debug) return;
+
+  // eslint-disable-next-line no-console
+  console.warn("[SocialShareButton]", message, err);
+}
 
   /**
    * Emits an analytics event through all configured delivery paths.