Depth buffer keeps resizing itself (Elden Ring)

Hello. I've asked this question on Discord but haven't gotten any answers so I figured I should ask here as well.

I'm trying to use the depth of field effect but my depth buffer keeps resizing itself. I've set it up already with displaydepth.fx. It works fine when it's not moving around. But it keeps moving around. Any idea what may be causing the issue?

And this is what I mean by resizing itself:

Game is rendering with dynamic resolution. Need to find the relevant option in the game settings and disable it.