diff --git a/src/bot/handlers/activity.py b/src/bot/handlers/activity.py
index de4b6f34..905d8b41 100644
--- a/src/bot/handlers/activity.py
+++ b/src/bot/handlers/activity.py
@@ -16,5 +16,21 @@ class ActivityHandler:
             self.handle(message)
 
     def handle(self, message: Any) -> None:
+        text = str(getattr(message, "text", "") or "")
+        normalized = text
+        for marker in (
+            "\ufeff",
+            "\u200b",
+            "\u200c",
+            "\u200d",
+            "\u2060",
+            "\u2066",
+            "\u2067",
+            "\u2068",
+            "\u2069",
+        ):
+            normalized = normalized.replace(marker, "")
+        normalized = normalized.lstrip()
+        if normalized.startswith("/") or normalized.startswith("／"):
+            return
         self.io_layer.track_group_text_activity(message)
-
diff --git a/src/bot/handlers/city.py b/src/bot/handlers/city.py
index 80a52409..ca9bf4d6 100644
--- a/src/bot/handlers/city.py
+++ b/src/bot/handlers/city.py
@@ -11,8 +11,28 @@ from src.bot.services.city_command_service import CityCommandService
 from src.bot.settings import CITY_QUERY_COST
 
 
+def _normalized_command_head(text: str | None) -> str:
+    raw = str(text or "")
+    for marker in (
+        "\ufeff",
+        "\u200b",
+        "\u200c",
+        "\u200d",
+        "\u2060",
+        "\u2066",
+        "\u2067",
+        "\u2068",
+        "\u2069",
+    ):
+        raw = raw.replace(marker, "")
+    raw = raw.strip()
+    if raw.startswith("／"):
+        raw = "/" + raw[1:]
+    return raw.split(maxsplit=1)[0].lower() if raw else ""
+
+
 def _is_city_command_text(text: str | None) -> bool:
-    head = str(text or "").strip().split(maxsplit=1)[0].lower()
+    head = _normalized_command_head(text)
     return head == "/city" or head.startswith("/city@")
 
 
diff --git a/src/bot/handlers/deb.py b/src/bot/handlers/deb.py
index b4768d00..54f8b7ad 100644
--- a/src/bot/handlers/deb.py
+++ b/src/bot/handlers/deb.py
@@ -11,8 +11,28 @@ from src.bot.services.deb_command_service import DebCommandService
 from src.bot.settings import DEB_QUERY_COST
 
 
+def _normalized_command_head(text: str | None) -> str:
+    raw = str(text or "")
+    for marker in (
+        "\ufeff",
+        "\u200b",
+        "\u200c",
+        "\u200d",
+        "\u2060",
+        "\u2066",
+        "\u2067",
+        "\u2068",
+        "\u2069",
+    ):
+        raw = raw.replace(marker, "")
+    raw = raw.strip()
+    if raw.startswith("／"):
+        raw = "/" + raw[1:]
+    return raw.split(maxsplit=1)[0].lower() if raw else ""
+
+
 def _is_deb_command_text(text: str | None) -> bool:
-    head = str(text or "").strip().split(maxsplit=1)[0].lower()
+    head = _normalized_command_head(text)
     return head == "/deb" or head.startswith("/deb@")