I think this started with PS4 patch v1.46 - Strange issue with backing out of a menu or map. The "Circle" button is used for that - if you bring up a map, then use the circle button to exit, the skill associated with that button fires too. To replicate, assign a skill that doesn't require focus (like Rapid Maneuver for example) to the circle button. Open map. Exit map. Skill fires on exit.
May not sound like a big deal, but it didn't used to be this way and it's a tad awkward when you're in stealth near a keep in Cyrodiil, you look at the map real quick, and when you exit, Vigor fires too - removing your character from stealth in front of ten enemy players
PS4NA