We can run krunner searching only trough a single runner, for example we can search for bookmarks:
qdbus-qt5 org.kde.krunner /App displaySingleRunner bookmark
When entering any text into this bookmark-SingleRunner that happens to be the beginning of a webshortcut such as
A suggestion for the google webshortcut shows up
> gg: 1234
When pressing enter nothing happens, since there is no bookmark called "gg: 1234", and we are in the bookmark-SingleRunner, which doesn't know how to handle webshortcuts.
Suggestions for webshortcuts should not show up in a SingleRunner that is not the webshortcut-SingleRunner.
The only SingleRunner where the suggestions should be shown is this one:
qdbus-qt5 org.kde.krunner /App displaySingleRunner webshortcuts
Well the runner is called bookmarks, that might have been the issue.
But currently the single runner mode is broken and we get results from all plugins.