i have a bug with eevee when i rendering, my volumetric ambiance disappear sometimes without any reason. I noticed it once a sequence was rendered, some frame, totally random, i haven't my volumetric.
Look for exemple frame 187 its ok, 188 bug, i retry instant to render 188, and it's ok.
I think it may be the fact that my object with volumetric shader have a animation, it grows until the camera is immersed in it, and finds the volume. But when this object become static, after on my animation, i have a same problem.
I can't make this volumetric on world, i have already it for ambiance of full scene. My animation it's like putting your head in water.
If somebody have tricks to avoid this, I can save time rather than render bugged frames one by one.
Thx community !