FWIW I have *not* seen this since upgrading to Bionic. It was probably fixed sooner, when they said it was, but at some point I gave up on Artful because of various gnome-shell problems including this, went back to Mac, and tried again with a fresh Bionic install, where they almost all seem to have been fixed.
FWIW I have *not* seen this since upgrading to Bionic. It was probably fixed sooner, when they said it was, but at some point I gave up on Artful because of various gnome-shell problems including this, went back to Mac, and tried again with a fresh Bionic install, where they almost all seem to have been fixed.