Subpixel Rendering Broken on 1.54

Hi,

I just updated Atom from 1.51 to 1.54 and noticed that subpixel-smoothing has been broken for me on Ubuntu 20.04.
I have tried adding
.editor {
-webkit-font-smoothing: subpixel-antialiased;
}
to my stylesheet, but that does not seem to help.
I am using the default One Dark theme.

Any ideas what might cause it?