I have a Dell XPS 2-in-1 I bought about 6 months ago. GzDOOM 4.4.2 (or any subsequent dev builds) did not work with the Dell installed Iris drivers. Floors and some entities are either invisible or just black. I installed 100.857 and it works correctly.
I have since upgraded to 100.873 and it is broken again. Reinstall 100.857 and it works again.
I tried clean installs of gzDoom with no configuration changes other thank enabling Vulkan as the render. You can reproduce 100%
I am able to reproduce the issue. See this video of my lab test.
You could revert to driver 100.8476 or 100.8587, or if you prefer maintaining the latest driver you could switch the API to OpenGL, but only as temporary workaround so you can keep killing those pesky demons!
I'll report this to our driver dev team ASAP. I can't promise any particular outcome but if there is any news or update I'll post it here.
Thank you for taking the time to report this issue to us.