Handheld GPSMAP Screen locked after charge

[STATUE]

Brand new Garmin GPSMAP 79S/SC.

After charging from the mains (in UK), the screen locks.

Only way of getting out is to remove the 2 batteries, putting them back in again, then all is fine.

Must be me ?

 

[lustyd]

Do you have auto lock on? My 66 locks automatically and I need to unlock before I can do anything.