I have the exact same problem so +1.
After submission and the 100 first matches, my AI reaches top 60. If others players send their AI and give me more matches, my AI needs at leat 4 hours (~300 games) to reach its rank (which was top 8-26 last 48 hours).
If there’s no reset, I think the number of games done after 1 submit should be increase to at least 250. Even if that means to set a limit of 1 submit / hour / coder.