I'm using Sway as my Wayland compositor. HexWalk displays correctly whenever the
window dimensions are up to 1920×1080, but if scaled beyond that, it leaves an
unused (don't know whether to say "uninitialized", but becomes transparent to
the background) space; I'm attaching a screenshot to show it.

Given that tiling Wayland compositors and X11 window managers have grown in
popularity in recent years, I think this bug will affect many users, with
monitor sizes that are no longer beyond "usual".

Thank you!