The merge was reverted because it breaks scrolling with the mouse wheel for people even without IMs, I think events are being "eaten" by the search_entry widget because it has the focus. Previously even though this happened too, event_box was getting all of them too.
Anyway this is just speculation, I haven't tested all of this, but maybe adding EventBox back will fix it? (I have no idea what will happen to fcitx here).
The merge was reverted because it breaks scrolling with the mouse wheel for people even without IMs, I think events are being "eaten" by the search_entry widget because it has the focus. Previously even though this happened too, event_box was getting all of them too.
Anyway this is just speculation, I haven't tested all of this, but maybe adding EventBox back will fix it? (I have no idea what will happen to fcitx here).