Why will RCB and MI face each other only once in IPL 2025 league stage?

RCB and MI will face each other once in IPL 2025 league stage. Each team will play four teams from their own group twice, four teams from other group once and one team from other group twice, making it 14 matches/team. Group B comprises MI, SRH, GT, DC and LSG, while Group A comprises CSK, KKR, RR, RCB and PBKS.