ibus 1.5.3 or later supports the system cache besides the user cache and the system cache can reduce the launching time of ibus-daemon when the users log into the desktop session initially. I'd ask the engines to have 'ibus write-cache --system' in their %post and %postun if the engines are installed by default comps. Please refer the %post and %postun in ibus-anthy: http://pkgs.fedoraproject.org/cgit/ibus-anthy.git/tree/ibus-anthy.spec#n105
ibus-typing-booster-1.2.4-3.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/ibus-typing-booster-1.2.4-3.fc20
Package ibus-typing-booster-1.2.4-3.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing ibus-typing-booster-1.2.4-3.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-18102/ibus-typing-booster-1.2.4-3.fc20 then log in and leave karma (feedback).
ibus-typing-booster-1.2.4-3.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.