text selection in host spawns multiple error messages in guests

[alienheartbeat]

When selecting text in a gtk app with a mouse in a host,
each guest running in that host gets many system log / journald log messages:

"localhost spice-vdagent[1039]: vdagent_clipboard_data: sel_id=1: no corresponding request found for type=1, skipping"
which may be repeated over 100 times.

Key points:
1 The messages appear immediately in all guests that are running at the time;
2 It only happens when selecting text in gtk apps (eg gedit, mousepad, zim) not qt apps (eg kwrite).
3 Doesnt happen when select text in a guest - the messages dont appear in the host or in other guests.

Versions
VMs are Xubuntu 22.04 with the -hwe kernel linux-image-6.5.0-28
running on 2 different Xubuntu 22.04 hosts, one with
the -hwe kernel linux-image-6.5.0-28-generic
and one with the standard linux-image-5.15.0-105-generic.

qemu-system-x86 6.2, libvirt 8.0.0, libspice-vdagent 0.22.1,
host: spice-client-gtk-3.0-5 libspice-client-glib-2.0-8 gir1.2-spiceclientgtk-3.0
    libspice-server1 v 0.15.0-2ubuntu4
    libvirt0 8.0.0-1ubuntu7.10 qemu-sustem-x86 1:6.2+dfsg-2ubuntu6.19
guest: spice-vdagent 0.22.1-1 qemu-guest-agent 1:6.2+dfsg-2ubuntu6.19