I'm using neon distribution on my Macbook Pro 2015. After upgrading it to KDE 5.11, I noticed that if I suspend my system and than resume it after some time, all subsequent tries to suspend fall because it automatically resumes after 12-14 seconds. And it doesn't matter if I suspend it with help of lid closing, typing in console `sudo pm-suspend` or `sudo systemctl suspend`. I already made fresh install from `neon-useredition-20171012-1018-amd64.iso` and the problem is still here.
I looked through this URL https://wiki.archlinux.org/index.php/Power_management/Suspend_and_hibernate and section "Instantaneous wakeups from suspend" helped me