Can the 2nd gen alarm arm itself?

Hi, I'm trying to remotely support my elderly mother who has a Ring Alarm Pro (2nd gen), which I installed for her on my last visit to the UK. Unfortunately she is reluctant to use it so it never gets used unless I arm it remotely when she is away for an extended period, then disarm it again when she is returning. Recently she nipped out for 5 minutes to the local shop and when she came back the alarm was sounding, however she had not knowingly armed it. I was able to disarm it for her remotely but now the alarm is using Alarm Mobile Backup, despite her internet connection being okay, which means I am unable to see any events in the Ring app.Q1. Is it possible for the alarm to arm itself?Q2. Is anyone aware of this happening due to a malfunction or when the "The Ring System is experiencing difficulties"?Q3. What can I tell her to do to get the Alarm Pro to use her internet connection instead of mobile backup