Description of problem:
GNOME Wayland changed the protocol version between gtk and mutter in Fedora 29 and any input methods cannot commit any strings in gnome-terminal when the multiple Tabs are open.
I also observed the same problem in gedit and soffice.
This problem does not happen in Fedora 28.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Open gnome-terminal
2. Type Ctrl-Shift-t and open a new tab
3. Enable ibus-libpinyin
4. Type 'a' and Space
Any string is not committed.
A Chinese character is committed with Space key
meta_wayland_text_input_focus_commit_text() sends the committing string but GTK does not receive the string.
*** Bug 1628447 has been marked as a duplicate of this bug. ***
I'd like to suggest the protocol version in f29 is reverted to one in f28 between gtk/modules/input/imwayland.c and mutter/src/wayland/meta-wayland-text-input.c
Looking at this now
Discussed during the 2018-08-20 blocker review meeting: 
The decision to classify this bug as an "AcceptedFreezeException" was made as this is inconvenient for users of different input methods in the Workstation live and would benefit from a fix in the compose.
Correction to comment 4:
Discussed during the 2018-09-17 blocker review meeting:
gtk3-3.24.1-1.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-2e24c97cb1
gtk3-3.24.1-1.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-2e24c97cb1
gtk3-3.24.1-1.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.