Weird error with rofi and thunderbird #17

Hello,
in my config I have set these two things:

[commands.swipe.three]
up      = "thunderbird"
down    = "rofi -show drun"

When I execute the down gesture rofi starts but it can not start Thunderbird. Even no process with the name thunderbird shows up.

When I execute the up gesture thunderbird does not open but it does show up about twenty processes named thunderbird.

I'd like to debug this more but it actually only happens when gebaar is started with gebaard -b.

Note that I use sway and thus wayland. Also note that none of this happens with libinput-gestures.

PS: Thank you for writing this great daemon!