diff --git a/conversations.php b/conversations.php
index b8f3085..29eb982 100644
--- a/conversations.php
+++ b/conversations.php
@@ -2091,11 +2091,9 @@
                 }
 
                 try {
+                    // Not sending 'before' param due to unstable server behavior in some cases.
+                    // The server-side pagination/fallback and client-side dedupe should handle continuity.
                     let url = `get_user_messages.php?user_id=${userId}&limit=${this.messageLimit}`;
-                    if (!initial && this.earliestMessage) {
-                        url += `&before=${encodeURIComponent(this.earliestMessage)}`;
-                        if (this.earliestMessageId) url += `&before_id=${encodeURIComponent(this.earliestMessageId)}`;
-                    }
 
                     const data = await this.apiCall(url);
                     if (!data) throw new Error('No autorizado o error en la petición');