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At some point recently the syslinux menu started being in the background at my login screen. I'm not using a display manager or desktop environment. I don't know when this started.
Here is a short video showing the issue.
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Update:
Apparently systemd is supposed to clear the screen before the login prompt via TTYVTDisallocate which defaults to yes for agetty.
However this doesn't work for me.
I instead created an override file that runs agetty on tty1 without the --noclear option (which is present in the default unit file).
I still think systemd is broken in this regard, but I can't seem to do anything else about it.
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You could try "MENU CLEAR" in "/boot/syslinux/syslinux.cfg".
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