Bamboo does not drop from fishing in a jungle. I tried for 4 hours with no success and someone else tried for 15 hours with no success.

I had no idea it dropped from the Jungle fishing. Sorry about that...

That was the only way to get it in the past, since I can't seem to find the biome in my entire world at all despite the mod being there since day one.

I fixed the bamboo spawning in Jungles, I'll look into the fishing loot tables in a later update

Running 0.2.11 for 1.12.2 and bamboo is still not spawning.