Small docs tweak and bugfix

docs/docs/configuration/zones.md

@@ -157,8 +157,8 @@ The average speed of your object as it moved through your zone is saved in Friga
 
 #### Best practices and caveats
 
-- Speed estimation works best with a straight road or path when your object travels in a straight line across that path. If your object makes turns, speed estimation may not be accurate.
-- Create a zone where the bottom center of your object's bounding box travels directly through it and does not become obscured at any time.
+- Speed estimation works best with a straight road or path when your object travels in a straight line across that path. Avoid creating your zone near intersections or anywhere that objects would make a turn. If the bounding box changes shape (either because the object made a turn or became partially obscured, for example), speed estimation will not be accurate.
+- Create a zone where the bottom center of your object's bounding box travels directly through it and does not become obscured at any time. See the photo example above.
 - Depending on the size and location of your zone, you may want to decrease the zone's `inertia` value from the default of 3.
 - The more accurate your real-world dimensions can be measured, the more accurate speed estimation will be. However, due to the way Frigate's tracking algorithm works, you may need to tweak the real-world distance values so that estimated speeds better match real-world speeds.
 - Once an object leaves the zone, speed accuracy will likely decrease due to perspective distortion and misalignment with the calibrated area. Therefore, speed values will show as a zero through MQTT and will not be visible on the debug view when an object is outside of a speed tracking zone.

web/src/pages/Settings.tsx

@@ -132,7 +132,7 @@ export default function Settings() {
     if (cameraNames.includes(camera)) {
       setSelectedCamera(camera);
     }
-    return true;
+    return false;
   });
 
   useEffect(() => {