I noticed that my Krookodile wasn’t taking Life Orb recoil when using Earthquake, and after finding out that no move that can deal damage to more than one Pokemon in a double battle causes Life Orb recoil, I found another (older) thread that said Life Orb wasn’t causing the damage multiplier that it was supposed to even though it was causing recoil.
I’m not sure what version that they had been having the problem on, and now I’m wondering if it’s fixed in the most recent version of the game.