Board Game Arena

If I have a city with a normal meeple and a builder and I connect it to a city with a large meeple. I then lose majority but do i also lose the speciel ability of my builder? Or is it a bug in the game? My friend can't find it in his rules at home.

The builder ability does not require you to have the mayority. If you add a tile to a city where you have your builder already in this city, then you will get a second tile to play.