While it was charging they launched a nuke and when it fired I got kicked to the menu with no option there after to reconnect. I have also had an issue with my commander ending up in the sun if he leaves a moon as its destroyed.
I feel for you! It would crash right at the most epic bit where your about to win... The game is usually pretty stable these days, sounds like maybe the combination of Nuke + Annihilasor is the issue (there are a few bugs relating to nukes in this build from what I've seen). If you could, can you go into your replays and find the ID number for this game and post it here? That way Uber can take a look and figure out what caused the server to crash
i have the epic backwards flying nukes they also go a skew xD and a few time just fly around the target area and then collide after a few seconds
