Is this bug fixed on Unity 2017 ?

I have still the issue with Unity 5.6.3f1. 8-9k LOD groups

Getting this error in 5.5.1f1. Can't make huge forests in open world game because of this.

Still getting this in 5.6.1f1! Basically means can't use unity's build in LODgroup system for trees.

5.3.5 still reproduced, 10k lod groups

Unity 5.2, still happens after I instantiate large amount of LODGroups, even in Coroutine;

I run into the same error (unity 5.1.1f1). The log appear when running a script executing in editor mode to instantiate a large amount of LODgroups in the scene. It looks like it reaches a maximum amount at a certain point, and then the problem affects the first LODgroups previously instantiated one after the other.

At runtime, for a LODgroup affected, only the main mesh renderer isn't visible. While the subobjects of the main gameobject are correctly showing.
Note that colliders are correct.

More details:
- This error can potencially hang Unity both in editor and the final build (game freezes, audio gets looped in a 0.5s loop, you have to force close it via task manager) but it doesn't happen everytime.

- The error happens less frequently if you span the instantiation across several frames. (instead of instantiating 5k lodgroups, instanciate 1k for 5 frames.) This makes the game stutter or hang temporary but has better chances to avoid the error.

Could this be related to the changes in the way unity handles instantiation?
(instantiation done by secondary threads?)

I'm having this issue with way less than 32k lodgroups.
In my case, more than 6800 lodgroups causes this.
It may be dependent on the lodgroup complexity.