This is absolutely infuriating. I stopped playing 7 Days for quite some time because of the poor performance. Came back recently for A19 and the game runs perfectly now.. except for the phantom blocks. Mostly marble, but I've also noticed sink tops appearing on top of trash piles and a few other glitchy things. It happens so often, especially on random gen, that it makes the game virtually unplayable. It doesn't seem to matter what settings I change - I've tried everything from fully maxed to medium settings + half textures, I've tried DX11/OpenGL/Vulkan (Vulkan just crashes), tried changing the Steam shader precaching, etc.
For reference, my specs:
Ryzen 3 1300x
16GB RAM
Radeon RX5600 XT
I love this game, but I'm about to give up on it altogether because this issue - which has been around for a while and apparently gone totally unaddressed - makes it almost unplayable.