I’ve uploaded the screenshots I took of yesterday’s missing pieces. They were a bit more scattered and fewer than previous instances - this is more reflective of the day-to-day manifestations of the behavior. Scattered pieces, not very many, just enough to make you think you’re going crazy and forgetting to place things.
There should be a sandstone stairpiece in front of me here:
This single ceiling piece:
These five ramps:
*Edit: Although it’s hard to tell, these latest instances have occurred within the affected “vertical slice”, just like all the previous ones. The structures look different because I can’t seem to stop building. No pieces outside of this vertical slice have ever disappeared.