diff --git a/frigate/api/app.py b/frigate/api/app.py
index 71b9dbc74..383b76151 100644
--- a/frigate/api/app.py
+++ b/frigate/api/app.py
@@ -158,6 +158,18 @@ def config(request: Request):
         for zone_name, zone in config_obj.cameras[camera_name].zones.items():
             camera_dict["zones"][zone_name]["color"] = zone.color
 
+        # Re-dump profile overrides with exclude_unset so that only
+        # explicitly-set fields are returned (not Pydantic defaults).
+        # Without this, the frontend merges defaults (e.g. threshold=30)
+        # over the camera's actual base values (e.g. threshold=20).
+        if camera.profiles:
+            for profile_name, profile_config in camera.profiles.items():
+                camera_dict.setdefault("profiles", {})[profile_name] = (
+                    profile_config.model_dump(
+                        mode="json", warnings="none", exclude_unset=True
+                    )
+                )
+
     # remove go2rtc stream passwords
     go2rtc: dict[str, Any] = config_obj.go2rtc.model_dump(
         mode="json", warnings="none", exclude_none=True
@@ -229,9 +241,7 @@ def set_profile(request: Request, body: ProfileSetBody):
             content={"success": False, "message": err},
             status_code=400,
         )
-    request.app.dispatcher.publish(
-        "profile/state", body.profile or "none", retain=True
-    )
+    request.app.dispatcher.publish("profile/state", body.profile or "none", retain=True)
     return JSONResponse(
         content={
             "success": True,
diff --git a/frigate/config/profile_manager.py b/frigate/config/profile_manager.py
index ac07cf54c..d5cd6f921 100644
--- a/frigate/config/profile_manager.py
+++ b/frigate/config/profile_manager.py
@@ -101,7 +101,9 @@ class ProfileManager:
         """
         if profile_name is not None:
             if profile_name not in self.config.profiles:
-                return f"Profile '{profile_name}' is not defined in the profiles section"
+                return (
+                    f"Profile '{profile_name}' is not defined in the profiles section"
+                )
 
         # Track which camera/section pairs get changed for ZMQ publishing
         changed: dict[str, set[str]] = {}
diff --git a/web/src/utils/configUtil.ts b/web/src/utils/configUtil.ts
index 0be14059b..1707bc720 100644
--- a/web/src/utils/configUtil.ts
+++ b/web/src/utils/configUtil.ts
@@ -533,10 +533,21 @@ export function prepareSectionSavePayload(opts: {
       ? {}
       : rawSectionValue;
 
+  // For profile sections, also hide restart-required fields to match
+  // effectiveHiddenFields in BaseSection (prevents spurious deletion markers
+  // for fields that are hidden from the form during profile editing).
+  let hiddenFieldsForSanitize = sectionConfig.hiddenFields;
+  if (profileInfo.isProfile && sectionConfig.restartRequired?.length) {
+    const base = sectionConfig.hiddenFields ?? [];
+    hiddenFieldsForSanitize = [
+      ...new Set([...base, ...sectionConfig.restartRequired]),
+    ];
+  }
+
   // Sanitize raw form data
   const rawData = sanitizeSectionData(
     rawFormData as ConfigSectionData,
-    sectionConfig.hiddenFields,
+    hiddenFieldsForSanitize,
   );
 
   // Compute schema defaults