Running wtype messes up language module in Waybar

[pgnickb]

I'm running barebones sway with waybar and the corresponding language display module sway/language.
When using wtype the language panel displays an empty string instead of the actual keyboard layout in use.
This happens within the

wl_display_disconnect(wtype.display);

Not sure if this is a known issue and whether I should continue debugging this or stop here or simply report a bug to the upstream.

Also any pointers are welcome.