question about run demo

[dkerjw1]

Hi, thanks for your amazing work,

when I ran the demo use the command

python ./examples/slam_demo.py --dataset_dir=./datasets/Replica/office0 --dataset_name=nerf --buffer=100 --slam --parallel_run --img_stride=2 --fusion='nerf' --multi_gpu

I got the a lot log like this and then it miss in fusion loop:

Fusion packet from SLAM module is None...

And when I run sigma-fusion, the end log is

End of SLAM sequence, nothing more to fuse...

is that right?