Yes, I started seeing hangs on shutdown yesterday. So far I'm only seeing it on the two 32-bit systems that I have. I need to check the 64-bit systems -- so far no one has complained about them. Also running systemd 44-12 here.
EDIT: After updating, the 64-bit systems are showing the same issue. Either from the user X session, or from a root console login, the shutdown sequence hangs with a blinking cursor in the upper left corner, which is totally nonresponsive to the keyboard. Ctrl-Alt-Del will resume the shutdown sequence, which becomes a restart, not a shutdown/power off.
These systems are a variety of video hardware -- Intel, AMD, and Nvidia, so I'm confident that the issue is not directly graphics-related. And since it happens on a root tty1 console, with X shut down, I don't think it has anything to do with the X server, either.