Displaydepth.fx just causes the screen to flicker

I have no idea what is causing this, but here's a video of it in Skyrim Special Edition:



I am trying to run ENB AND Reshade at the same time, but they don't seem to be causing any other interferences (if this is even one)

That flickering is not caused by DisplayDepth.fx but ReShade picking the wrong texture for the depthbuffer every couple of frames.
Did you already try using a different setting in the DX11 tab?