[Open] Dark items and Sims since Date Night update

Version: 42.0.0.150003 (Android on ARM)

I have been investigating this for ages, but can't determine the cause.

• Randomly occurs upon loading the lot, regardless of daylight settings.
• It can affect sims that were on the lot, and floors above first.
• Entering build mode, reloading the lot, or moving the sim into a different room – all make it normal again.
• My theory is that it's caused by light sources leaking into different floors.