I seem to be showing probs with this too. I am running 18.104.22.168
If I set pets to the Pet frame I cant get it to show (the frame doesnt show up),
If I set pet to Frame 1 (my main healing frame for raid/tanks etc) my elementals DO show up in that frame.
I dont use fluid bars. Pets dont seem to show up when I turn on test bars (with any combinations of options) - not a biggie.
I sadly dont have time for a lot of testing today so I cant test different combinations.