Please Help, I've adjusted my mods and trees are disappearing

[Fractalbase]

I have Simply Bigger Trees installed for a long time and never had a problem with trees.

I recently added some mods, and in the process, uninstalled and then reinstalled SBT and added a tree texture.

Then trees in active cells were missing. As in the trees simply weren't there. I have saves with trees and when loading the saves, the trees are gone. I've even tried a new game and trees are simply gone.

There would be trees in the distance, but as I approached them, they would disappear.

I tried a lot of different things, including uninstalling and reinstalling SBT, the texture, etc., reinstalling Skyrim SE and my mods, no luck.

It wasn't until I first successfully ran an older version of SSELODGen (from Nexus) that the trees came back. They were just there. Everything seemed fine.

But my understanding is that this is a problem with the models or whatever in active cells, and not with LODs, so I don't know why that would have worked.

Then I changed up my mods slightly again (because I'm finalizing my load order for a new playthrough) and trees in active cells disappeared again.

I looked on the S.T.E.P. website and tried the recommended xLODGen beta and DynDOLOD, but the trees in active cells are still not back.

Trees in the distance have always been fine.

I don't have any mods I can think of that affect trees except SBT. I didn't have this issue with my modded SkyrimSE or SBT for a long time and then it just happened. And I don't know why SSELODGen would fix it if it only has to do with items in the distance.

It occurred to me that, while I use Loot to sort mods (Vortex uses Loot), I might have to specify the load order for DynDOLOD.esm (after other esm's and USSEP.esp) and for DynDOLOD.esp (after all other esp's). But again, I've been told that that won't fix the problem.

But I've tried reddit and found no help there. The SBT description says that any weirdness is due to a conflicting mod, but I can't find any mod of mine that affects trees at all except SBT really.

I wanted to post on the SBT forum, and while there are recent posts, I don't have permissions to post there for some reason.

I've tried Sheson's DynDOLOD Support forum, but they only help with LODs, and that's not the issue that I'm having.

The advice I got from there is:
"There might be an issue with the full model NIF or the full textures, because it seems there must be tree references, else there would be no LOD generated for them.

You need to troubleshoot the mods affecting the full model NIF and/or placements/references and base records in the plugin(s) of the trees and ask in the appropriate forums for the mods involved."

This seems to be the best and only place to find help.

Modwat.ch only works for LE, and I use Vortex, and there isn't an easy way to list mods, but here is my current plugin load order: https://pastebin.com/5b4Xu0Mc

Any help about the missing trees in the active cells would be greatly appreciated. I really want to fix this problem.

[Fractalbase]

I fixed this by swapping out Simply Bigger Trees and replacing it with 3D Trees and Plants.