What made you remove nv container in the first place? Seems an odd thing to remove at random.
Went to check what Nvidia processes and services were running. Nothing random about it if you see an Nvidia process running thats not meant to be there.
Like I said NVContainer service is not meant to be included in a "clean" driver version install but somehow it gets installed. Tried it with NVCleanInstall and the guru3d clean drivers (466.x)