diff --git a/handlers/bots/__init__.py b/handlers/bots/__init__.py
index 3ef6e6b3..75e4d71f 100644
--- a/handlers/bots/__init__.py
+++ b/handlers/bots/__init__.py
@@ -674,12 +674,37 @@ async def bots_callback_handler(
                 setting = action_parts[1]
                 await handle_pmm_adv_setting(update, context, setting)
 
-        # Bot detail
+        # Bot detail (legacy: bot_name embedded directly — retained for any
+        # callers where the name length is known-safe).
         elif main_action == "bot_detail":
             if len(action_parts) > 1:
                 bot_name = action_parts[1]
                 await show_bot_detail(update, context, bot_name)
 
+        # Bot detail by index — resolves the index to a bot_name from the
+        # per-user cache stashed by show_bots_menu. Keeps callback_data under
+        # Telegram's 64-byte cap for long bot_names that would otherwise
+        # overflow the name-based callback form. Cache lives in user_data (not
+        # chat_data) so group-chat users don't clobber each other's state.
+        elif main_action == "bot_idx":
+            if len(action_parts) > 1:
+                try:
+                    idx = int(action_parts[1])
+                except ValueError:
+                    logger.warning(
+                        f"Non-integer bot_idx callback: {action_parts[1]!r}"
+                    )
+                    return
+                bots_list = context.user_data.get("bots_main_list", [])
+                if 0 <= idx < len(bots_list):
+                    await show_bot_detail(update, context, bots_list[idx])
+                else:
+                    logger.warning(
+                        f"bot_idx {idx} out of range (cached list has "
+                        f"{len(bots_list)} entries); re-opening bots menu"
+                    )
+                    await show_bots_menu(update, context)
+
         # Controller detail (by index, uses context)
         elif main_action == "ctrl_idx":
             if len(action_parts) > 1:
diff --git a/handlers/bots/menu.py b/handlers/bots/menu.py
index bdefebb9..4c59d27b 100644
--- a/handlers/bots/menu.py
+++ b/handlers/bots/menu.py
@@ -50,29 +50,47 @@ def _build_main_menu_keyboard(bots_dict: Dict[str, Any]) -> InlineKeyboardMarkup
 
     # For 1-3 bots: one per row
     # For 4+ bots: two per row for better space utilization
+    #
+    # callback_data strategy: Telegram caps InlineKeyboardButton.callback_data
+    # at 64 bytes. The original `bots:bot_detail:{bot_name}` form (16-byte
+    # prefix + name) overflows for any bot_name >= 49 chars — e.g. names
+    # produced by hummingbot-api's deploy-v2-controllers endpoint, which
+    # auto-appends a deploy-time timestamp, routinely run past 70 bytes and
+    # crash /bots with telegram.error.BadRequest: Button_data_invalid.
+    #
+    # Strategy: prefer the stable name-based form when it fits (preserves the
+    # original behavior — stale buttons from an earlier /bots message still
+    # open the correct bot regardless of list reordering). Fall back to the
+    # index-based form only when the name-based form would overflow. The
+    # dispatcher resolves the index against a per-user cache stashed in
+    # context.user_data["bots_main_list"] by show_bots_menu.
+    def _bot_callback(i: int, name: str) -> str:
+        cb = f"bots:bot_detail:{name}"
+        return cb if len(cb.encode("utf-8")) <= 64 else f"bots:bot_idx:{i}"
+
     if len(bot_names) <= 3:
-        for bot_name in bot_names:
+        for i, bot_name in enumerate(bot_names):
             display_name = bot_name[:30] + "..." if len(bot_name) > 30 else bot_name
             keyboard.append(
                 [
                     InlineKeyboardButton(
                         f"📊 {display_name}",
-                        callback_data=f"bots:bot_detail:{bot_name}",
+                        callback_data=_bot_callback(i, bot_name),
                     )
                 ]
             )
     else:
         # Two bots per row for better space utilization
-        for i in range(0, len(bot_names), 2):
+        for row_start in range(0, len(bot_names), 2):
             row = []
-            for j in range(i, min(i + 2, len(bot_names))):
+            for j in range(row_start, min(row_start + 2, len(bot_names))):
                 bot_name = bot_names[j]
                 # Shorter display name when two per row
                 display_name = bot_name[:25] + "..." if len(bot_name) > 25 else bot_name
                 row.append(
                     InlineKeyboardButton(
                         f"📊 {display_name}",
-                        callback_data=f"bots:bot_detail:{bot_name}",
+                        callback_data=_bot_callback(j, bot_name),
                     )
                 )
             keyboard.append(row)
@@ -171,6 +189,15 @@ async def show_bots_menu(update: Update, context: ContextTypes.DEFAULT_TYPE) ->
         # Format the bot status message
         status_message = format_active_bots(bots_data, bot_runs=bot_runs_map)
 
+        # Cache the ordered bot-name list so the dispatcher can resolve the
+        # index-based callback (bots:bot_idx:{i}) back to a name. Must be set
+        # BEFORE building the keyboard so the indices we stash match the
+        # indices embedded in the buttons. Stored in user_data (not chat_data)
+        # so two users sharing a group chat don't overwrite each other's
+        # cached list — matches the per-user convention used elsewhere in
+        # this handler (e.g. current_controllers in __init__.py).
+        context.user_data["bots_main_list"] = list(bots_dict.keys())
+
         # Build the menu with bot buttons
         reply_markup = _build_main_menu_keyboard(bots_dict)