Windows + Y shortcut doesn't work

Hello,

when I set an application shortcut for Windows (Super) key + Y in the keyboard settings (Application shortcuts), that shortcut doesn't work after a restart, but all others do. When I reset the application shortcuts in the settings, it works but not in a new session. Interestingly, I get following journal messages:

org.xfce.Xfconf[1242]: DBG[xfconf-backend-perchannel-xml.c:1897] xfconf_backend_perchannel_xml_flush_channel(): Flushed dirty channel "xfce4-desktop"

I'm using Xfce 4.16-pre2 on Arch linux on a 5.10rc6 linux kernel.

Regards, Tobias