Lol,
Wah, rule 1 is to never leave a kid in a running car alone.
Rule 2 is to never forget rule1
Anyway,
Its probably a programming sequence from the remote, it also happens if a door switch is open, including hatchback, the door locks will work but indicators wont flash until all switches are open circuit.
There maybe a switch in the latch too and is now broken (just like old crown etc) as no manufacturer ever expected that the owner would lock passengers inside.