Smooth scrolling is not smooth on 144hz

[apprehensions]

Current Behavior:
Smooth scrolling creates a 60hz like scrolling

Desired Behavior:
Smooth scrolling creates smooth scrolling, regardless of rate, always update.

How can we reproduce it (step by step):

1. Get a monitor that is not 60hz, preferably above 60hz.
2. Enable smooth scrolling
3. Observe it is not smooth

Environment:

Linux Distribution & Version: Alpine Linux
Output of luakit --version:

luakit 5cff4d87
  built with: webkit 2.42.4 (installed version: 2.42.5)
                 GTK 3.24.38 
                GLIB 2.78.4 
                SOUP 3.4.4 

Note about webkit issues:

WebKit/WebKit#12591
This is resolved on WebKit, however the issue appears with epiphany.