Camera DOF problem | hard edges | quixel megascans | Depth of field

[HulpeSergiu]

That seems like a problem with your smoke material, make sure the material has "Render after DOF" checked off

[roman-chi]

by some reason I have weird hard edges around my objects when using DOF. It looks like it is happening with mesh I bring from quixel megascans. What could be the issue ? Please help