I got solve my problem in update 1.58.69 for TS4. I updated all my script mods and I restored my save for a point before the problem happens. Works perfectly and my two students come back to their household.
For me, closing the account, taking out the bank mod, play without it for a bit and putting it back seems to have solved the issue, without other changes made.
Last evening updated my game to 1.58.69 and it seems to have fixed this one, all saves work fine now. I'll just blame previous patch and/or aliens on this one.
Some of the LE's didn't even make much sense so i guess it was just the game having trouble loading all stuff properly.
If someone still has issues, i suggest to take all tuning/script/custom trait mods out of mods folder and updating them/removing if not confirmed working and deleting localthumbcache.package
Load save with issues and save it as new one, then quit game and put new updated mods back in and play. This should fix this issue.
