I recently had a teammate disconnect in a shared army battle, and a short while later both commanders exploded simultaneously. They were not selected at the time of the explosion. This is with the Titans expansion. I will post the lobby ID as soon as it shows up in replays.
This has been fixed in the current PTE and once that proves stable, it will be pushed out in a patch for all. See https://forums.uberent.com/threads/titans-pte-build-87070-pte-is-now-live.70287/
