To me, the instant warp after the main bomber get's killed is only a minor problem.
What's really annoying is the repeated, unpredictable drone warping when the lead bomber is maneuvering. The pilot doesn't even need to do some wild immelmans - fly a relatively gentle turn at high speed, and the drones will play the "now I'm here...now I'm not" game, constantly warping out of the fighters gunsight.