No. From your player perspective, you appear to have your emote canceled, however, as I said in my quote, from other players perspective, once the buff animation concludes, your character returns to the emote pose without any player action.
Log in to a second account, try out any buff on your emoting character and see from that perspective. Others have pointed out that some buffs do break through this, including Chronal Shift and Empowering Circuit.