It's a great system in theory and I am excited about its potential, but it has some extremely egotistical and irresponsible developers who don't give a damn about what they break, as long as they can keep pushing code out without community testing or review to slow them down. Debian was flat out wrong to go with systemd until it reaches a certain level of maturity and stability, but there's no going back now.
FWIW "HandleLidSwitch=ignore" is another back-to-normal that will probably save you some walking.
This is a bug report in debian unstable against a bleeding edge version of systemd released 5 days ago.
And it's having a negative effect on their own pet distro as well, see this thread:
https://lists.fedoraproject.org/archives/list/devel@lists.fe...
You act like every single systemd user on the planet upgraded to the bleeding edge version of systemd and had this configuration option changed on them overnight.