My Smart Home Camera Started Recording Randomly at Night—Is This a Hack or a Bug?

I noticed last week that my smart home security camera kept turning on and recording late at night when no one was home. I double-checked the app logs and saw activity timestamps around 2-3 AM, even though I never manually accessed the camera then. I’ve updated the camera’s firmware and changed all related passwords, but it still happened twice since. The camera is connected to my home Wi-Fi, which I secured with a strong password, and I don't share access with anyone. I’m worried it might be someone remotely accessing it or some kind of glitch triggering false motion detection. I’ve also disabled the motion alerts for now since the notifications are waking me up. Has anyone else experienced random nighttime recordings on their smart cameras? What’s the best way to confirm if this is a hacking attempt or just a software bug? Are there any extra security steps I should take beyond changing passwords and firmware updates?