Ok so this is driving me nuts. I open Blender, add a quick smoke on the default cube. I try rendering it in Cycles. It works! I switch over to Eevee and it behaves in the strangest of manners as so you can see on the screenshots. I think it has to do with the Volume density info: it sems like Eevee can’t handle the data from there and instead applies a thin volume to the WHOLE SCENE instead.
Feels like this should be a common problem but I haven’t found anyone mentioning it so far.
I’ve attached a simple blend file. Just open it and see if you too get my problem.
(I tried it with both 2.9 and 2.83. The problem occurs in both)
untitled.blend (859.2 KB)