That looks like mIRC ? If it is, do
/debug @raw
and a new window should open that shows all the raw data and IRCv3 tags. Watch the output and see if something odd is happening, You should see msg-id=emote_only_on and msg-id=emote_only_off for each action. If you indeed see msg-id=already_emote_only_off without any other off’s being sent it is odd.
I just wonder if someone else, or something else is shutting it off and you aren’t getting the notice in your normal view.