Sounds like routing issues or corrupted objects somewhere in the neighborhood. If you have Master Controller, reset the whole town and if you have Debug Enabler, click city hall > nraas > debug enabler > city hall options > dumb alarms. It will create script error file to your Sims 3 folder (documents). Open the file with browser and see what it says. If there is a corrupted object it should let you know and you can fix it.
It would be helpful if you could tell which neighborhood this is happening.
Edit: I just realized you mentioned the neighborhood that is apparently custom made. Routing issues and corrupt objects are very common in these and it is worth resetting the entire neighborhood with Master Control when you start the game.
I apologize I thought costa del sol was the island paradise neighborhood. That’s what I’m playing on. I’ll download those command center mods!
Isla Paradise explains everything. There are routing issues in the neighborhood and you can find easy instructions on how to fix them (no mods needed) in this link:
https://www.reddit.com/r/Sims3/comments/cf5q7q/a_very_easy_isla_paradiso_lag_fix_no_mods/
