Description of problem:
The cursor position doesn't point to the correct place during pre-editing.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.make sure if ibus-kkc is installed and enable "Japanese (Kana Kanji)" in the input source.
2.open TextView at gtk3-demo for example
3.type Super+space watashinonamaehanakanodesu
This seems to be a regression since it works fine on f31. also running gtk apps with GTK_IM_MODULE=ibus also works. dunno what's wrong. so please reassign if it isn't a gtk issue.
It may be good to file an upstream bug too if this is still reproducible in the Beta composes?
I feel this is a potential F32 Blocker bug actually, since it affects normal CJK input badly.
That upstream change seems affecting this issue. preedit works back to the normal after reverting it. reassigning this back to gtk3.
I've confirmed that the following change in mutter fixes this issue: https://gitlab.gnome.org/GNOME/mutter/-/commit/db9b60cc6357539d0deefd9ded236b1dd302d4a2
Discussed during the 2020-03-23 blocker review meeting: 
The decision to classify this bug as an "AcceptedFreezeException" was made as this is very inconvenient for the default Japanese input method and various other similar ones, and cannot be fixed for live environments with an update.
FEDORA-2020-78f41bf351 has been submitted as an update to Fedora 32. https://bodhi.fedoraproject.org/updates/FEDORA-2020-78f41bf351
FEDORA-2020-78f41bf351 has been pushed to the Fedora 32 testing repository.
In short time you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-78f41bf351`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-78f41bf351
See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2020-78f41bf351 has been pushed to the Fedora 32 stable repository.
If problem still persists, please make note of it in this bug report.