LDView cannot handle arbitrary nesting of files. Here an example:
Consider the following file with exactly one stud:
https://mister-muffin.de/p/matM.txt
Lets include this file into another and arrange them into an array of 2x2 studs:
https://mister-muffin.de/p/ocCZ.txt
Now lets include this file again into another to create an array of 4x4 studs:
https://mister-muffin.de/p/rpCD.txt
The expected result would look like this:
https://mister-muffin.de/p/MLV6.png
But instead LDView renders it like this:
Never mind - this was a problem with conflicting file names on my system. You can close this.