Strange, notification vibration, can't locate source

[davehorne]

This just happened - my phone vibrated as if there were an incoming  call.  This occured three separate times within 15 minutes, the phone vibrated many times per episode.

I looked in  Settings / Notifications / Advanced notifications / Notification history, though there was nothing that looked unusual. 

I restarted my phone and so far so good. 

I'm not going to spend more time on this but if anyone has a suggestion, I'd love hear from you. 

[AndrewL]

@davehorne: That's a difficult one to diagnose. Did you have your phone set to Vibrate mode at the time in Settings > Sounds and vibration? Did you have any unread notifications, or apps open in the background? 

[davehorne]

Andrew, thanks for the reply.  The phone was not set to vibrate and in the Phone app under Recent, nothing ... no one called me at that time.

I haven't had this since. 

Strange.  

[TechZilla]

Sounds like your phone had automatically disconnected from the wifi/5g to preserve battery life and then reconnected and lots of notifications came through one after the other in quick succession

[davehorne]

I was at hone with an excellent WiFi signal, the battety wasn't low, and the vibrations were the sane as if I were receiving a phone call and the phone was set to vibrate. 

I haven't had this since.