error in performanece of fsdv2

I tried to train fsdv2 on waymo perception V1_4_0，and get the performance on validation set as follows. which is much lower than the performance in the paper

OBJECT_TYPE_TYPE_VEHICLE_LEVEL_1: [mAP 0.749648] [mAPH 0.745259] OBJECT_TYPE_TYPE_VEHICLE_LEVEL_2: [mAP 0.669701] [mAPH 0.66562] OBJECT_TYPE_TYPE_PEDESTRIAN_LEVEL_1: [mAP 0.80301] [mAPH 0.755212] OBJECT_TYPE_TYPE_PEDESTRIAN_LEVEL_2: [mAP 0.73128] [mAPH 0.685319] OBJECT_TYPE_TYPE_SIGN_LEVEL_1: [mAP 0] [mAPH 0] OBJECT_TYPE_TYPE_SIGN_LEVEL_2: [mAP 0] [mAPH 0] OBJECT_TYPE_TYPE_CYCLIST_LEVEL_1: [mAP 0.744445] [mAPH 0.734285] OBJECT_TYPE_TYPE_CYCLIST_LEVEL_2: [mAP 0.719278] [mAPH 0.709439]

This is the config I used fsdv2_waymo_full_2x.txt