[FIXED] Strange black streaks on map (Newcrest)

Product: The Sims 4
Platform:PC
Which language are you playing the game in? Nederlands
How often does the bug occur? Often (50% - 99%)
What is your current game version number?  1.59.73.1020
What expansions, game packs, and stuff packs do you have installed? Seasons, City Living, Get Together, Discover University, Island Living, Vampires, Parenthood, Spa Day, Laundry Day, Movie Hangout Stuff
Steps: How can we find the bug ourselves? Place a build that has terraint paint (and maybe debug bushes/flowers) from your library (selfmade house or downloaded from another user) in Newcrest. It doesn't matter if it's an old save or a new save, or if you're building on an empty lot or a lot that was already built on. It doesn't matter which lot, it could happen to all lots in Newcrest. 
What happens when the bug occurs? When I place a build from my library when I'm viewing the map, the house falls from above and places on the selected lot. At the same time black streaks fall from above and stick to the map (on the nextdoor lot -they go right through another build- or other places on the map). There's no way for me to delete the black streaks, because they can only be seen in map view. When the black streaks land on another lot and I go to that lot in build mode, there are no streaks to be seen in build mode. But when I go to map view, the black streaks are still there. At first I thought one of the builds in my library was corrupted, but it happened with several builds so I think the lots in Newcrest are corrupted. Or maybe it has to do with terrain paint, because I use a lot of builds with that.
What do you expect to see? I expect to see a clean map without black streaks that can't be removed.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Yes
Please describe the patch or change you made. It happened after several things changed. I first saw the bug on november 8th. A week before this, I bought Island Living, Vampires and Laundry Day Stuff in a bundle. Also on october 23rd there was a patch: Update 1.56.55.1220 , but I have no idea if it has to do with this patch cause I play on a Windows pc. And I made a big change to a save file on november 8th, maybe it was too much for the game? I started a new save to create a base save and I imported a lot of households into the game at once and I built on all the lots in Newcrest. That's when I first saw the bug.

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