Proving grounds crashing

It happens in every game mode where a battle takes place on that Malachor stage. (I just had crash in GAC that cost me a battle on that stage. The same thing also happened in the Tuskens/Inquisitor assault battle the other week.)

The work around is to go into audio settings and turn sound FX and music to "off." That should let you finish the battle without crashing. It worked for me, at least.