diff --git a/crawl4ai/async_configs.py b/crawl4ai/async_configs.py
index 383079fef..5538d1dbc 100644
--- a/crawl4ai/async_configs.py
+++ b/crawl4ai/async_configs.py
@@ -1685,11 +1685,11 @@ def __init__(
         max_scroll_steps: Optional[int] = None,
         process_iframes: bool = False,
         flatten_shadow_dom: bool = False,
-        remove_overlay_elements: bool = False,
-        remove_consent_popups: bool = False,
-        simulate_user: bool = False,
-        override_navigator: bool = False,
-        magic: bool = False,
+        remove_overlay_elements: bool = None,
+        remove_consent_popups: bool = None,
+        simulate_user: bool = None,
+        override_navigator: bool = None,
+        magic: bool = None,
         adjust_viewport_to_content: bool = False,
         # Media Handling Parameters
         screenshot: bool = False,
@@ -1725,7 +1725,7 @@ def __init__(
         process_in_browser: bool = False,  # Force browser processing for raw:/file:// URLs
         url: str = None,
         base_url: str = None,  # Base URL for markdown link resolution (used with raw: HTML)
-        check_robots_txt: bool = False,
+        check_robots_txt: bool = None,
         user_agent: str = None,
         user_agent_mode: str = None,
         user_agent_generator_config: dict = {},
diff --git a/deploy/docker/api.py b/deploy/docker/api.py
index 09a783939..53f36e733 100644
--- a/deploy/docker/api.py
+++ b/deploy/docker/api.py
@@ -729,7 +729,7 @@ async def handle_crawl_request(
                 for key, value in base_config.items():
                     if hasattr(cfg, key):
                         current_value = getattr(cfg, key)
-                        if current_value is None or current_value == "":
+                        if current_value is None:
                             setattr(cfg, key, value)
                 # SSRF: per-URL PDF strategies need the validator wired too
                 if isinstance(cfg.scraping_strategy, PDFContentScrapingStrategy):
@@ -740,7 +740,7 @@ async def handle_crawl_request(
             for key, value in base_config.items():
                 if hasattr(crawler_config, key):
                     current_value = getattr(crawler_config, key)
-                    if current_value is None or current_value == "":
+                    if current_value is None:
                         setattr(crawler_config, key, value)
             effective_config = crawler_config