I verified the test case using version 1.5.22-2ubuntu2.1 of the ibus packages from focal-proposed.
Also confirmed that Ctrl+Shift+u works as expected when the unicode-hotkey dconf value is set to default.
I verified the test case using version 1.5.22-2ubuntu2.1 of the ibus packages from focal-proposed.
Also confirmed that Ctrl+Shift+u works as expected when the unicode-hotkey dconf value is set to default.