New Patch Today
https://forums.thesims.com/en_US/discussion/937376/march-20-2018-patch-notes#latest Looks like they fixed the apartment glitch, the skill book glitch, and the party one.
Forum Discussion
I'm still getting glitches in San Myshuno, bad ones (stuck Sims, etc.). I didn't realize there was an issue with missing items in the apartments, but I have had that party glitch ruin more than one party. This is good news for my two legacy neighborhoods. :)
