diff --git a/plugins/platforms/telegram/adapter.py b/plugins/platforms/telegram/adapter.py
index a10ef88b06..07acb7ad03 100644
--- a/plugins/platforms/telegram/adapter.py
+++ b/plugins/platforms/telegram/adapter.py
@@ -5133,9 +5133,8 @@ class TelegramAdapter(BasePlatformAdapter):
         return self._extra_str_set("allowed_topics", "TELEGRAM_ALLOWED_TOPICS")
 
     def _telegram_ignored_threads(self) -> set[int]:
-        raw = self.config.extra.get("ignored_threads")
-        if raw is None:
-            raw = _scoped_gate_env("TELEGRAM_IGNORED_THREADS")
+        """Thread ids to skip: scoped ``TELEGRAM_IGNORED_THREADS`` → ``config.extra`` → none."""
+        raw = _extra_or_secret(self.config.extra, "ignored_threads", "TELEGRAM_IGNORED_THREADS", "", blank_is_unset=False)
         raw = _decode_json_list_literal(raw)
         ignored: set[int] = set()
         for value in (raw if isinstance(raw, list) else str(raw).split(",")):
@@ -5150,17 +5149,18 @@ class TelegramAdapter(BasePlatformAdapter):
 
     def _compile_mention_patterns(self) -> List[re.Pattern]:
         """Compile optional regex wake-word patterns for group triggers."""
-        patterns = self.config.extra.get("mention_patterns")
-        if patterns is None:
-            raw = _scoped_gate_env("TELEGRAM_MENTION_PATTERNS", "").strip()
-            if raw:
-                try:
-                    loaded = json.loads(raw)
-                except Exception:
-                    loaded = [part.strip() for part in raw.splitlines() if part.strip()]
-                    if not loaded:
-                        loaded = [part.strip() for part in raw.split(",") if part.strip()]
-                patterns = loaded
+        # Scoped env → the profile's YAML → none. Only the env rung is a serialized string (JSON list,
+        # newline- or comma-separated); a YAML string is one literal pattern and is left intact.
+        env_raw = _scoped_gate_env("TELEGRAM_MENTION_PATTERNS", "").strip()
+        if env_raw:
+            try:
+                patterns = json.loads(env_raw)
+            except Exception:
+                patterns = [part.strip() for part in env_raw.splitlines() if part.strip()]
+                if not patterns:
+                    patterns = [part.strip() for part in env_raw.split(",") if part.strip()]
+        else:
+            patterns = self.config.extra.get("mention_patterns")
         if patterns is None:
             return []  # before touching ``self.name``: tests build bare adapters via object.__new__
         return compile_mention_patterns(patterns, log_prefix=self.name, platform_label="telegram", display_label="Telegram", logger_=logger)
diff --git a/tests/plugins/platforms/matrix/test_blank_config_env_fallback.py b/tests/plugins/platforms/matrix/test_blank_config_env_fallback.py
index c8c88698f8..123856ad02 100644
--- a/tests/plugins/platforms/matrix/test_blank_config_env_fallback.py
+++ b/tests/plugins/platforms/matrix/test_blank_config_env_fallback.py
@@ -22,19 +22,29 @@ def test_blank_yaml_values_fall_through_to_env(monkeypatch, blank):
     assert MatrixAdapter._extra_truthy(config, "auto_thread", "MATRIX_AUTO_THREAD", "true") is False
 
 
-def test_explicit_yaml_values_still_beat_env(monkeypatch):
+def test_explicit_env_beats_yaml_and_yaml_beats_default(monkeypatch):
+    """Per-profile precedence: explicit scoped env → the profile's YAML → default. A blank env
+    value is unset (it must not clobber YAML); an explicit empty list is a real "no rooms" value."""
     from plugins.platforms.matrix.adapter import MatrixAdapter, _extra_csv_set, _resolve_max_message_length
 
+    yaml_config = PlatformConfig(enabled=True, extra={
+        "free_response_rooms": ["!a:example.org", " !b:example.org "], "max_message_length": 4000,
+        "auto_thread": False})
+
     monkeypatch.setenv("MATRIX_FREE_RESPONSE_ROOMS", "!env:example.org")
     monkeypatch.setenv("MATRIX_MAX_MESSAGE_LENGTH", "9000")
     monkeypatch.setenv("MATRIX_AUTO_THREAD", "true")
-    config = PlatformConfig(enabled=True, extra={
-        "free_response_rooms": ["!a:example.org", " !b:example.org "], "max_message_length": 4000,
-        "auto_thread": False})
+    assert _extra_csv_set(yaml_config, "free_response_rooms", "MATRIX_FREE_RESPONSE_ROOMS") == {"!env:example.org"}
+    assert _resolve_max_message_length(yaml_config) == 9000
+    assert MatrixAdapter._extra_truthy(yaml_config, "auto_thread", "MATRIX_AUTO_THREAD", "true") is True
 
-    assert _extra_csv_set(config, "free_response_rooms", "MATRIX_FREE_RESPONSE_ROOMS") == {"!a:example.org", "!b:example.org"}
-    assert _resolve_max_message_length(config) == 4000
-    assert MatrixAdapter._extra_truthy(config, "auto_thread", "MATRIX_AUTO_THREAD", "true") is False
-    # An explicit empty list is a real "no rooms" value, not "unset".
+    for name in ("MATRIX_FREE_RESPONSE_ROOMS", "MATRIX_MAX_MESSAGE_LENGTH", "MATRIX_AUTO_THREAD"):
+        monkeypatch.setenv(name, "  ")
+    assert _extra_csv_set(yaml_config, "free_response_rooms", "MATRIX_FREE_RESPONSE_ROOMS") == {"!a:example.org", "!b:example.org"}
+    assert _resolve_max_message_length(yaml_config) == 4000
+    assert MatrixAdapter._extra_truthy(yaml_config, "auto_thread", "MATRIX_AUTO_THREAD", "true") is False
+
+    monkeypatch.delenv("MATRIX_AUTO_THREAD")
+    assert MatrixAdapter._extra_truthy(PlatformConfig(enabled=True, extra={}), "auto_thread", "MATRIX_AUTO_THREAD", "true") is True
     assert _extra_csv_set(PlatformConfig(enabled=True, extra={"free_response_rooms": []}),
                           "free_response_rooms", "MATRIX_FREE_RESPONSE_ROOMS") == set()