It was part of V1. The attack on the Oscillator in V1 occurs where it did in the original movie - in the middle of the lightsaber battle. It probably needs to stay there because of the environmental destruction that happens as a result.

This scene juggling really highlights how there are tradeoffs and islands of stability in fanediting. There simply is no one best place to put this ‘damaged but still functional’ scene, since you’re breaking up the musical continuity of the film one way or another.