If you strip betternether:nether_reed blocks it drops a bark item with no texture and because it's not a log you can do it infinitely giving you infinite bark.

Bug: Right clicking a Nether Reed with an axe gives infinite bark.
Expected behavior: nothing happens.
Tested with just BetterNether and Immersive Weathering mods and their dependencies installed.
To recreate: Place any nether soil block next to lava then put a nether reed on it and right click it with an axe.