There's a bug (possibly engine bug) that's causing a game UI / HUD issue for large map loads that might be taking longer on slower machines. I'm putting in a fix to try to work around what I'm seeing might be potentially an engine issue, but still doing some more debugging on it.
If you end up seeing anything while you're playing where the game stops updating resource counters or game objectives, let me know, you might be one of the rare few in this situation that could help debug further.