I to meet also a problem which I did not have with the lite version. Little to be also connected to the problem explained above. Gaps in objects 3d as
well as zones without any placed objects.
I see from your image that the rendering buckets of the slave nodes don't match with the main scene. This problem is usually due to:
a) Different versions of Forest are installed on each rendering node
b) There are nodes of 32 bit and 64 bit mixed (this configuration is not supported).
If not, please render the scene separately on each node, and compare them with the same image rendered in the main workstation. If they don't match, there must be some difference in the configuration.