The Spectre 13 have a strange behavior with suspend under Linux. The power button blocks the suspend. The /proc/acpi/wakeup file can't be edited directly, your modification won't stay. The service is here to disable it definitely.
-Debian Stretch
-Debian Buster
-ArchLinux
-Ubuntu 18.04 LTS
-Manjaro 18
(Basically it should work on every systemd based distrib)
git clone https://github.com/PierreLeGuen/suspend_fix_13-V001NF
cd suspend_fix_13-V001NF
sudo cp suspendfix_pwrb.service /etc/systemd/system
sudo systemctl enable suspendfix_pwrb.service
sudo shutdown -r now
cat /proc/acpi/wakeup | grep PWRB
The line with PWRB should be "disabled"