Minecraft version & Mod Version:
Minecraft-1.18.1
RootsClassic-1.18-1.1.16
tetra-1.18.1-4.0.0
mutil-1.18.1-4.0.0

Single player or Server:
Singleplayer

Describe problem (what you were doing / what happened):
For some reason, some how, Roots Classic causes Tetra Tools to register their mine level wrong(?). Specifically, a double-head diamond pickaxe from Tetra, ISN'T considered a diamond pickaxe, and thus unable to mind obsidian, but only if RootsClassic is installed. Remove RC fixes the issue.

Crash log (if any):
N/A

Update: Been talking with the mod creator of Tetra, and he's aware of the issue and says that it's something on his end apparently. I'll leave this issue up until it's fixed. Here's a link to that issue:
mickelus/tetra#528

Mickelus requested I close this issue with a link to the one on his end, which I did in the post above. Closing the issue.