DynamicTrees-1.18.2-0.11.0-Beta10.1

Describe the bug
Trees don't drop seeds without destroying part of them. The dropped seeds from destruction, or dropped from the inventory don't generate new saplings, they just despawn. Tested with tick speed 400 and lower.
https://gist.github.com/xFirefalconx/3040dd022a16e09373214e5323402fa0 latest log, it might not be helpful at all.

To Reproduce
Steps to reproduce the behavior: You can download my old modpack version and upgrade Dynamic Trees to the 0.11.0-Beta10.1 as you see fit. Might make things faster, Name is "Royal Equines:Petrified Magic".
Ingame, you find a biome with vanilla trees by opening the creative inventory, picking a nature's compass, navigate to any that includes dynamic trees. Press teleport and then pick a chunk spawner, place it, right click on it. If that's too many steps, use the command "/execute in chunkbychunk:skychunkgeneration run teleport ~ ~ ~", find the biome, etc.
Within the biome:
Observation 1: The tree biomes are not fully habitated with trees, there is a large field with just empty grass space. Is this intentional so they can expand until that area is filled?
Observation 2: There are no seed drops. Wait as long as you wish, there will be none. Maybe it's not yet implemented, but I remember it being a feature in past versions. If that's the case, my apologies, then mark this as "Beta, WIP" and ignore the rest.
Observation 3: When seeds get dropped from the inventory or by destroying parts of the existing trees, they don't plant themselves. Drop a stack, just to be sure.

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Add any other context about the problem here.
Maybe there is a gamerule I am not aware of or a missing setting.

Mods List
What version of Forge are you running? 40.2.0

Disclaimer: Not all of these mods are involved in the bug, maybe not even any other than dynamic trees itself, maybe additionally Chunk by Chunk within the CBC generated world map. Maybe it's caused by Chunk by Chunk because the player starts in a different dimension, or by the mod that plants forests with vanilla saplings, or that sort.
As I'm working on my modpack update, I will include all currently loaded mods, though. The list... might change. I also have mods in there that I deactivated, I don't list them here. Let me know if you need any extra info, I can also fetch you a new latest.log from startup only if you need that in any case.

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You're misunderstanding how these mechanics work. To address your observations:

1. The trees only drop randomly in biomes with a high forestness¹.
2. Seeds have a very rare chance² to drop 'voluntarily' (randomly without player intervention).
3. By default, and also based on biome suitability, seeds have a 1/6 chance³ per tick to plant themselves once dropped on the ground.

Hope this clears things up.

¹ Configurable via biome database populator.
² Configurable via voluntarySeedDropRate in the server config.
³ Configurable via seedPlantRate in the server config.