diff --git a/src/channels/telegram.rs b/src/channels/telegram.rs
index b1dca1988..1eeb65d4b 100644
--- a/src/channels/telegram.rs
+++ b/src/channels/telegram.rs
@@ -246,6 +246,23 @@ fn strip_tool_call_tags(message: &str) -> String {
     super::strip_tool_call_tags(message)
 }
 
+fn find_matching_close(s: &str) -> Option<usize> {
+    let mut depth = 1usize;
+    for (i, ch) in s.char_indices() {
+        match ch {
+            '[' => depth += 1,
+            ']' => {
+                depth -= 1;
+                if depth == 0 {
+                    return Some(i);
+                }
+            }
+            _ => {}
+        }
+    }
+    None
+}
+
 fn parse_attachment_markers(message: &str) -> (String, Vec<TelegramAttachment>) {
     let mut cleaned = String::with_capacity(message.len());
     let mut attachments = Vec::new();
@@ -260,12 +277,12 @@ fn parse_attachment_markers(message: &str) -> (String, Vec<TelegramAttachment>)
         let open = cursor + open_rel;
         cleaned.push_str(&message[cursor..open]);
 
-        let Some(close_rel) = message[open..].find(']') else {
+        let Some(close_rel) = find_matching_close(&message[open + 1..]) else {
             cleaned.push_str(&message[open..]);
             break;
         };
 
-        let close = open + close_rel;
+        let close = open + 1 + close_rel;
         let marker = &message[open + 1..close];
 
         let parsed = marker.split_once(':').and_then(|(kind, target)| {