easymotion-overwin-f2 has broken target characters on macOS

[busfahrer]

I'm using easymotion-overwin-f2 on vim 8.2.5032, on macOS.
When I use "s" to jump somewhere, the letters do get highlighted in red, but the letters stay the same instead of being changed to the jump target letters. (see screnshot below)

What I did to reproduce this: delete my .vimrc and .vim folder, clone easymotion as described in the manual installation of the readme, then created a .vimrc that only contains the sample config from the README (also, see screenshot)

One interesting thing I noticed is that for the line motions easymotion-j and -k, the target letters are replaced correctly and jumping works fine.

Oh and I'm on iTerm2, but I have the same issue on the vanilla mac terminal.