I think it is because you are playing a warez version.
I remember years ago RA2 was one of the first games to have fancy piracy triggers in the code where if you were playing a cracked version that hadn't been fully cracked strange things would happen.
Your example is one of them, also one was that you couldn't finish a mission, and another was all your units blowing up for no reason.
I'd suggest either finding a better crack, or turn to the light side and don't play illegal pirated copies.







