Chromebook insists on connecting to the distant RBR20 satellite, not nearby router

An Acer Chromebook in my household absolutely insists on connecting to the worst possible access point.   The RBR20 router is in the living room, and the satellite serves the deck and is three rooms away - walls, pots and pans, an endless amount of obstructions are in the way of the signal.   When we're in the living room, all other devices (phones, Mac laptops, streaming boxes etc) properly connect to the correct access point, the router itself.   But no matter how many times I reboot or powerwash the Chromebook, it insists on connecting to the satellite, which of course has a terrible signal.   How to fix?