What's your hardware and GPU driver? Also, how do I access the map?
My laptop CPU is Intel Core i5-9300H, GPU is NVIDIA GeForce GTX 1650 driver version 455.38 running PRIME Offload.
I run the game through Steam Proton, version 5.13-2. Currently I disable Steam Runtime since it cannot use the GPU (https://github.com/ValveSoftware/steam-runtime/issues/295).
To access the map, you press Tab in the game. To tilt it, hold Alt then move your mouse.
I can reproduce it on 1660ti. Somehow, after I leave the map, geometry starts to disappear:

The map issue reproduces on RADV as well.
Game screws up R32_UINT vs RAW buffer types, which triggers a mismatch. Falling back to pure texel buffers works around the issue.
VKD3D_DEBUG=warn:x1 2020-11
You can watch it here (YouTube link).
Log with VKD3D_DEBUG=warn: DeathStranding-vkd3d.zip.
Screenshots:
Map - Normal:

Map - Tilted:
