Timeline Shows Alarms That Did Not Happen

We purchased and installed the newer version of the system last week.  Aside from one of the sensors falling off a door at 3am causing an alarm, we've been very happy with simplisafe.  Upon waking this morning, 2/14/2021, and accessing the timeline on our app, we noticed EVERY sensor was tripped last night showing "Alarm" at different times throughout the night.  The strange thing is there was not Audible Alarms set off, nor were there any icon ( ! ) alerts on the key pad display screen.  Is this a glitch in the system?  My wife now believes we were hacked?  Can someone provide a rational explanation.