Red Bull seemed to be enjoying a period of relative stability after consistent rumblings behind the scenes in the early part of the season. But tensions have now flared up once again between Jos Verstappen and Christian Horner. When Adrian Newey handed in his resignation ahead of the Miami Grand Prix, Verstappen senior warned that the team was at risk of ‘falling apart’. That seemed to have clear ramifications for the future of his son. The Bulls have managed to prevent any high-profile figures following Newey out the door, at least in the immediate aftermath. And Max Verstappen seemingly conf…