Have a 2020 Challenger. Push button start . Ran the key fob through the wash. Dried it out (6 months ago now) and changed the battery , now if I lock the car , then next time I’m within 10-20’ of the car with the fob the right tail light flashes and the driver door unlocks. Sometimes it will do it when I’m walking away after locking it . So I figured ok I screwed up and the fob is somehow permanently damaged.

Here’s where it gets strange .

I also have a 2014 Ram . Key fob goes in the dash to start it . Out of the blue it starts doing the same thing as the Challenger.
Changed the battery , still does it .

Should mention I’m not pushing any buttons. Just happens on its own.

Any ideas?