Xbox - Specialization ability "Rock and Roll" occasionally doesn't work

I've been using the pilot ability Rock and Roll to mitigate the absorb and pulse damage that the Crystalline Entity does. I've got the timing down, but occasionally, it won't actually cast. I press the button, the cooldown triggers, but my ship just sits there and gets hit.

Again, I have the timing down. When I started doing this, I was using it too late (trying to use it just as the meter filled), not accounting for whatever the server is doing that causes these things to not sync up properly. Now, I use it well before the meter fills, but not so early as to miss the pulse. But again, on occasion, it just doesn't work. I just had it fail for the umpteenth time (actually got me killed this time), and though I'd bring it to your attention.