Hi,
Landscape grass spawning is very dodgy, especially on larger landscapes. It always starts spawning far away from the camera instead of the camera location. This is unless you run CVAR grass.CullDistanceScale=1-2-3 etc, which seems to force LGT to spawn around the camera once a different value is input.
Messed around with all the different grass related CVARs and none seem to make it behave differently.
See this video which showcases the issue. As you can see, grass always spawns on each component horizontally and a set distance from the camera, unless I run grass.CullDistanceScale which immidiately spawns everything around the camera.