Dead keys toggle krunner

Whenever I try to enter a special character by typing dead key + regular key (for example, acute + A for "á"), krunner shows up. If I press a dead key while krunner is up, krunner is then closed.

Tested with the Brazil ABNT and the US intl. with dead keys layouts.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: plasma-workspace-wayland 4:5.12.4-0ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: KDE
Date: Fri May 4 14:05:29 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-10-18 (197 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: plasma-workspace
UpgradeStatus: Upgraded to bionic on 2018-05-02 (2 days ago)