xfce4-power-manager-4.19.3 - System tray icon fails to launch

Upgraded to xfce4-power-manager-4.19.3 from 4.19.2 and the system tray icon no longer launches upon startup. It can be launched via xfce4-power-manager -c (or xfce4-power-manager-settings) and toggling off and back on again, but it will not launch on next login.

Have tried on multiple machines and with multiple icon packs to no avail.

I looked at the ebuild (Gentoo) and noted many dependency upgrades but have not chased them down individually to see what may have been the culprit.

I run Xmonad WM and use trayer for a system tray (Qtile as backup has same issue). This is on Gentoo running Kernel 6.9.3-gentoo.

Downgrading to 4.19.2 fixes the "issue".