Using just a simply setup with this mod does not cause any problems here, also no duplicate form id reported. That probably means that most likely another plugins is required to reproduce this.
The other plugin(s) also add trees in the same or adjacent (5x5 uGrids) cells where this is happening. You could try this to compile a hopefully short list of potential plugins:
Enter any of the form ids into xEdit top left FormID field and press enter.
In the right window where it shows all the reference data of that tree, find the top row "Cell", CTRL+CLICK the entry in the whiteforest.esp column [CELL:xxxxxx] (in Tamriel "Skyrim" [WRLD:0000003C] at... and once in the Cell data shows, take note of all other plugins than the vanilla+DLC or unofficial patch.
You can also click the cell entry in the left tree view and if no other plugin is listed in the particular cell record find adjacent cells by looking at the coordinates < x, x > in the Name column.
You also could just quickly click or arrow key through all couple dozen cells whiterunforest changes in the same Sub-Blocks and note any other plugin. There probably won't be many.
Looks like JK's Superlite Merged esp's the culprit here. Ran DynDOLOD w/o it and no more stuck LODs. Then I re-installed the mod and those LODs returned. So whether I include JK's in DynDOLOD generation or not, it seems to be affecting Whiterun Forest's LODs.
Does JK's have anything to do with trees?
Edited by XenolithicYardZone, 13 October 2017 - 04:19 AM.