This planet, Kef Bir, is being called an ocean moon. While the world we saw in ROTJ was the forest moon, which was a satellite of the giant planet Endor. In the time since ROTJ everyone had taken to just calling the forest moon Endor. I have to guess that wreckage from DS2 landed in a number of places. The explosion was impressive, but with any explosion there is going to be debris. In this case VERY large debris which can be seen streaming away in that shot from the surface of the forest moon at the end of ROTJ.
I think Jesse might be on to something from a story standpoint. And there's another consideration: production security! The forest where those Endor scenes in ROTJ were shot is pretty well known among fans. Imagine TROS production going on location in California and the hordes of fans who might turn up trying to take it all in.