Does the tamper alert set off siren immediately?

Hello, I've been using Ring Alarm for around a month now, and one of my contact sensors just triggered a false alarm because the door was pushed a little more toward the door frame while it was already closed. I've now set up entry and exit delay on all sensors (by setting everything to main door, which I didn't realize before was required for entry/exit delay to be enabled). I've become deathly afraid of triggering more false alarms in the middle of the night and waking everyone in the house up and have a couple of questions. 1. I've read that tamper alerts can also set off the siren and that there have been reports of false tamper alerts. Does it set the siren off immediately, and is there a way to disable it completely from setting the siren off, or apply some kind of delay to it to ensure there's actually an issue? 2. Also, I am nearing end of a trial period for Ring Protect Plus which gives me cellular backup when the wifi is disconnected. I like the cellular backup feature but otherwise have no need for professional monitoring. What happens when the wifi cuts off when I no longer have Protect Plus? Does it trigger any sirens or just a notification on the app? Thanks.