Minecraft: 1.21.1
NeoForge: 21.1.217
LootR: 1.21.1-1.11.36.110
Some sand and gravel blocks refuse to break, they disappear and immediately reappear. If I go into creative to check them out, it says "You can not break Lootr chests in creative unless you crouch.". So at the very least I know it's Lootr, but I'm not 100% sure on if there's a setting I'm missing or if this is something that can be covered on your end.
Anyway thanks for the mod, it and you are greatly appreciated! All the best for 2026!