@puzzlezaddict
These are the 2 lots I used:
Celebirty Mansion (No CC) by pancake101 from Mod The Sims. (I want to correct something I previously said. Turns out this lot doesn’t have much terrain manipulation. I thought it had because I placed it in the ocean and doing that messed up the lot’s edges, leading to the mistake. Not a big deal honestly and I don’t think it would change anything but I thought I should mention it)
15 Summer Hill Court by CarlDillynson from Mod The Sims. (This is the landgraab mimic I talked about before.)
Now just for laughs and giggles, I decided to launch the game and try to test it again; Just to have more recent data and possibly a few video recordings.
I’ve set the Texture detail to high and loaded up a fresh new save in Sunset Valley and went to the Landgraabs again. This time their house flashed pretty consistently when zooming away from it. Same thing happened with the Altos and the store venue as well as 15 Summer Hill Court. I decided to change the setting back to low and try a new save and there wasn’t any flashing.
Quite a bizarre bug. I hope the silence from EA means that they are working on patching this bug along with other ones like the missing water interactions in one big patch. A naive hope I'm aware but one can dream.
Edit: I've tried to upload the videos I've captured of my tests using the in-game video recording tool but was unable to upload them here. I could upload them to Google Drive and post a link here but I'm unsure if that's allowed.
I've also gone back and tested a few other lots. The gym, library, museum, fire station, and rabbit holes were fine and flash-less. The Goth house though flashed when I tried to go to the attic and zoom away from the lot; other floors were fine though. I also decided to retest the Landgraab house while I was at it since that house had proven to be odd for me and it still flashed just like last time.