Comment 8 for bug 2054919

I've seen this same issue a few times as well. I never noticed that it doesn't happen on the very first login though, that is interesting info for troubleshooting for sure. Maybe a misconfiguration is being pulled over with the skel files when establishing the profile for the first time that's causing the issue?
I have also noticed that, once you have logged in once and xfce4 session crashes, so you then are forced to login again, after that the problem doesn't reappear until the machine is rebooted. I've also set up a test user account and confirmed that user account has the same issue -> login, crash, login again and is successful. Also, once the crash happens and you login again successfully, you can then logout and back in w/o the issue occurring again. It happens on both of the profiles/accounts I have setup on this machine. Both accounts are administrator level on Xubuntu 24.04.