Thank you for posting this. I don't know how long I have been experiencing this, but I only discovered that I was having a problem when I had a child sim travel to a cemetery I created in Foundry Grove so that I could try to complete the latest event. Imagine my horror when my "Simetery" was empty, including generations of graves I had placed there even before we had official cemeteries. I was able to recover an old save that still has everything in it to save to my library. However, when I try to place THAT version of my lot into my most current save, it is missing most of the gravestones. I could not complete this week's event tasks because, in addition to my blank lot, I found that the magic tree was also missing. (I used an alternate save to do those tasks.) I would like to share my main save file with someone investigating the problems. I finally figured out which file to upload to my Google drive. If a developer is interested in looking at it, I can provide a link.
