Couldn’t find a way to fix it. But I noticed that the way you pull the door to open really mathers, I must always open it from the upper part of the latch, and use a second hand to hold the device. If you use just one hand to open without enough strength on inicial pull, the lock system will go into a mid status where it doesn’t back to lock status and can’t go further to unlock status, this is not visible but obviously the door lock stops working... It’s really boring and non pratical, but I’m used now to use both hands to open it.