documents search doesn't work
OS: Ubuntu 18.04 64 bit, GNOME shell 3.28.1
This would be appear to be the same as the comment on the end of here (which affected Fedora as well) https://bugzilla.gnome.org/show_bug.cgi?id=670150
There is a downstream bug for Ubuntu here https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/970686
I came here as I was going to suggest adding searching for recent documents, but (see the first bug above) it was removed in favour of document search, which seems to have got broken in distros at some point.