Brouhaha, quite rightly, refused to do so, and this was the reason for the fallout. No management dispute, simply a change of the goalposts once the game has started, given that the band were involved in the creative process from day one.
The band declined to comply with the request, leading to a breakdown in relations. There wasn't a management disagreement; rather, the goalposts shifted once the project began, as the band was actively involved in shaping its creative direction from the outset.