Bug - Starwars: Empire at war: crash when trying to blow up planet withdeath star that has hero units

How to reproduce:
- Start up game Starwars: Empire at war
- Start up a multiplayer game, select Empire as race
- Play game and build a Death Star
- Slowly take over the galaxy and slowly push all Rebel Hero units onto one planet
- Move Death Star with units to planet that has hero units on the planet
- Proceed with space battle and survive to use Death Star Laser
Description
The game crashes and window's has a program not responding error.

Personal Notes:

This is quite annoying after playing through a massive galaxy map and when your just about to win by "Fire the Laser!! Mua hahaha" .... Windows error .. game has stopped responding .... Grrr!!