[FR] Foundation edges becoming transparent in Residential Rentals

When I made a residential rental lot and played as a landlord I had this happen as well, also stairwells started having solid floors even though the sims could still use the stairs.  The save became corrupt in the end and unplayable. Also the ownership panel of the units kept disappearing (was saying they didn't own a rental).  I have since learnt that this has happened to a number of players. I was on a laptop at the time, tested without mods and still had the issues.