sluggish perfomance when sims spawn ?

brubruQC1998  If you mean that this site is deleting posts or blocking you from submitting, it's possible you're getting caught by the spam filter.  The only thing to do there is wait, unfortunately, although you can always report a post you're trying to reply to and say that your reply disappeared.  You wouldn't get anyone in trouble; the EA community managers would see the report and hopefully dig your post out of the spam queue.

At any rate, I don't know what else to suggest unless you want to go down a troubleshooting rabbithole.  It's possible the game is bahaving strangely on your computer, or that there's an unusual context in which this happens on proper gaming systems that's only hitting a relatively small number of players.  I'll keep an eye out for more reports, or any other suggestions, but I don't know of a specific reason this would be happening to you right now.