Custom tree won't generate / grow under certain conditions

[Dizzlepop12]

I have a very strange problem. I have a custom tree that's supposed to generate in the desert, but it doesn't generate. If I immediately plant the sapling and grow it when I spawn, no matter what biome I'm in, it'll generate. However, if I leave the spawn area it turns into air - no tree structure or anything, just air. I checked my world generator class, my tree structure class, the sapling class, everything, yet I can't figure this out. All help is greatly appreciated.

Git Repo

Sapling Class

World Gen

Registries

My best guess is that the sapling class isn't detecting the meta variant correctly, so it's setting all the blocks as air instead of generating the structure, but I don't get why it's doing this.

Edited July 24, 2018 by Dizzlepop12

[Draco18s]

44 minutes ago, Dizzlepop12 said:

My best guess is that the sapling class isn't detecting the meta variant correctly, so it's setting all the blocks as air instead of generating the structure, but I don't get why it's doing this.

That code couldn't possibly be running: flag is never set to true anywhere ever. The highlighted chunk is unreachable code.

[Dizzlepop12]

9 minutes ago, Draco18s said:

That code couldn't possibly be running: flag is never set to true anywhere ever. The highlighted chunk is unreachable code.

That's exactly what I was thinking, but I don't know what else would be preventing it from generating.

[Draco18s]

Step through it with the debugger.