PC went idle while backup is running

[EricDHH]

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu Bionic Beaver (development branch)"

Behaviour:
Using the dejadup package with autofs to a NAS system for backups. The new ubuntu put the PC to idle while a dejadup is running. If awakened by mouse or keyboard the backup went on.

Expected Behaviour: gnome-power-manager should detect the running backup and wait until end for his idle.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-power-manager 3.26.0-1
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 31 11:34:05 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-03-20 (10 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180319)
SourcePackage: gnome-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)