The three sections are are just for a
quick temporary trial separation of a few hours for you to find out whether you have made the right decision as you who Honey is with if you wish to; too short to break any bond. You do not need a lot of space for a few hours to work out by which divider Honey ends up sitting and sleeping most; i.e. who he wants to be with more. We cannot tell you off the cuff sight unseen whether Honey is with the boy he wants to be with.
Your three boys are currently at the all time testosterone high and the classic teenage fall-out age. Please do not try to reintroduce; it will not work.
Your overall cage space looks to rather too small with the smaller cage being a glorified hamster cage (and even they actually prefer larger premises) as sadly still sold by far too many pet shops around the world.
The lack of space that teenage boys need will have contributed to the problems. Normally the boys would simply part ways with the 'loser' moving away. They cannot do that in a cage setting where they cannot even get away from each other, sadly. Shop bought teenage trios have unfortunately a very high fail rate because they have to balance three personalities that mat or may not match through the massive hormone spikes that happen over the course of the 10 months of teenage and that sometimes can last into younger adulthood, too.