V3 siren triggers randomly

I have a few v3 cameras, all with 4.36.0.252 firmware. On all of them I have disabled the siren function. Despite this, one unit (and only one) turns on the siren randomly (can’t figure out a pattern but it’s maybe once every few months that I’m aware of). This is making that camera unusable as I have now unplugged it so it doesn’t wake me up at night etc. Anyone seen this before or have tips or do I need to send this unit in for a replacement?

I’d replace it if a factory reset doesn’t work. If that happened, I wouldn’t want to risk it happening again.

They don’t require you to send the unit back sometimes.