Ok here is the thing, if you push an objective and get on it and actually stay there for too long you don't get any rewards because your team just dies off like flies, ive had it so many times that i get on the point, fresh 5 waves, died there capturing and then out of nowhere we have 2 waves, we had 5 and all this while i was on the point doing my job.
Insurgency sandstorm has bigger maps and this means you need more time to get on the point so if you are on the point you die quickly or miss the wave because you arrived too late to die at the point and the team that was on the point before respawns, this means waves get lost way faster.
sorry for bad english