Dead keys toggle Krunner on Wayland

[romrio]

I've just updated to 18.04 and I'm running Plasma on Wayland. It's looking pretty good so far, except for a very annoying issue: whenever I try to type a special character that uses a dead key (say, acute + A to type á), krunner shows up. If I do the same with krunner opened, it closes. I've tested it with the BR-ABNT and US international (with dead keys) layouts and it happens in both, so apparently it's unrelated to layout.

Any ideas?

Thanks.