By the way, at this point in the game now that everyone has nukes, I suggest we go with the standard practice of letting everyone log in after military moves so they can clean up with their Workers if needed. (Only moving Workers, nothing else.)
Otherwise the problem is much the same as with air raids: player 2 can always reconnect his resources before the build phase goes through, but player 1 can be perpetually denied his critical resources for builds. It's not a fair situation when that's the case.