Trending @Accenture; Received only 6.17% Bonus😭

I have completed 4.2 years at Accenture, and in this cycle I received a 6.17% (18k) bonus with zero hike. Is it because I asked to be rolled off in September and informed them that I have a medical issue and cannot work 12+ hour shifts? I joined this project in mid-July, and right now only KT is going on. Can I ask them why I received a much lower bonus compared to my previous projects (where I received around 50k twice), or should I leave it as it is?