[Bug 2035584] New: IBus japanese input method, Anthy, doesn't show suggestions as one types

https://bugzilla.redhat.com/show_bug.cgi?id=2035584

Bug ID: 2035584
           Summary: IBus japanese input method, Anthy, doesn't show
                    suggestions as one types
           Product: Fedora
           Version: 35
          Hardware: x86_64
                OS: Linux
            Status: NEW
         Component: ibus-anthy
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail],
                    [e-mail], [e-mail],
                    [e-mail]
  Target Milestone: ---
    Classification: Fedora

Created attachment 1847739
  --> https://bugzilla.redhat.com/attachment.cgi?id=1847739&action=edit
Difference between anthy & mozc

Description of problem:
Anthy doesn't show suggestions when typing. IBus-anthy preferences have been
kept as default since installed, and the "Candidate Window Page Size" setting
has 10, so it should suggest words as one types.

Mozc for IBus, on the other hand, does show candidates as intended.

Version-Release number of selected component (if applicable):
anthy-unicode-1.0.0.20201109-10.fc35.x86_64
ibus-anthy-python-1.5.13-3.fc35.noarch
ibus-anthy-1.5.13-3.fc35.x86_64
ibus-1.5.25-6.fc35.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Enable IBus, and anthy in the IBus preferences as input method for Japanese
2. Switch to the Japanese IME then start typing in a window that expects an
input

Actual results:
Word suggestions don't appear below typed words, so there's no way to use words
with Kanji or Katakana, only Hiragana.

Expected results:
As one begins typing each word, suggestions should start appearing below that
can be navigated with the arrow keys and selected with the Intro key

Additional info:
Fedora Linux 35 (Xfce) x86_64
Kernel 5.15.10-200.fc35.x86_64
Xfce 4.16 Xfwm4