Yes I got the same and didn't see your post until after I create a new discussion. Seems to have been happening for years according to everything I found online. I have yet to find anything substantial from Apple. I doubt it is a virus or malware probably a bug from the OS or a update to an app.
Oh by the way it locked me out and forced me to change my passcode. Since then I have changed it through settings to an aplha numeric. Everything seems to be working normally.