Flashers lights keeps flashing when car is stopped
 

Hello,
I just bought a used Sonata Hybrid 2016 Limited. Whenever I stop the car, get out and lock the door using the button on the handle, the flashers lights (head, tails and on the mirror) begin to flash at a slow pace and never stops. I have to press the Lock button on the remote to make them stop. I have looked all over the user manual but can't find any indication for this behavior and even the dealer don't know (it's wasn't a Hyundai dealer).

anyone has an idea what it might be?
thanks for your time and help

If you don't use the lock button on the handle ,but only the remote lock , is everything ok then?

Did you notice if the vehicle was really locked as the indicators were flashing?
Is there by any chance a second remote in the vehicle that you do or do not know about?