Someone has repeatedly tried to unlock my device?!

Noticed this situation this morning. Central shows multiple failed PIN entry attempts on my device, even though nobody was physically operating the device (during the night, sleeping alone in the room). I noticed that these repeated "attempts" have been recorded for the last 12 days, also during daytime, as the Bitdefender Central browser page shows.

When I try to see in the app for how long these have been happening, the Bitdefender Central app crashes to home screen.

My device: OnePlus 8, OS Android 13 (Oxygen OS 13.1), 05 may 2023 security update installed.

Please advise