My Sonata door locks sometimes click on lock lock lock for several times when I start to drive off. Then sometimes when i use the FOB on the driver door it will not lock or unlock by pressing door button with FOB in my pocketbook. I take FOB out and point it and press FOB open and door opens.

 

Some of the lock features can be changed in the setup through the trip meter controls, but unless the fob battery is getting weak, I'm not sure what it could be