Postproces material looks different on two different versions.

I tryed to make night vision effect for my project so I copied the way it was made here:

I got it working on 1.15 version and it looked like this:
bandicam 2021-03-04 17-23-59-345.jpg
It has this little pixelisation or not and shaking efect.

But after updating my project to 1.18 pixelisation and shakines disapired :

It doesn’t looks good to me but the problem is that I have very little knowlege in materials and post procesing soo I don’t know where to even start looking at problem.

This is how nodes are arrenged in my material:

I have no idea what could change becos I didn’t touch anything betwen versions.
Any help greatly appreciated.