Floodlight cam slow to react

I have had a floodlight camera for about 18 months. A couple months ago, it was disabled by a guest taking it down. Since then, it is meaningfully less sensitive (even turned all the way up) than it was prior to being removed from the wall. I have reset it in the app, and the WiFi is strong. Any idea why this would happen, or what I can do to fix it? I have checked the zones, etc.Previously, it would turn on for crows in the driveway, now, it sometimes misses cars.