C4 Picasso doors only open with remote control

Hello, I’ve had that before, doors only open with remote control and not when I’m in the grip of the driver’s or front passenger’s door. About 3 months ago the effect disappeared after 2 days and now it reappears in the cold. The remote control and the car are almost new – bought in August 2015. The friendly doesn’t know any advice and taps on the car battery voltage!?! First winter! The remote control battery should last longer than half a year. The door handles si nd clean and dry. So far the remote control opener always goes, but I am suspicious how long. Who had the problem before and how it was solved. On Monday I am back in the workshop.