If I remember correctly it’s not currently possible to specify that the harmonic circle should appear only on the first note in a tie chain, but if I’m remembering incorrectly I’m sure somebody will tell you!
Lillie suggests you change the notehead in the program for artificial harmonics to solve this problem.
Quoting her …
" You can edit the corresponding notehead set (i.e. remove the whole note notehead, and tell the remaining one used for minims to be used for all durations longer than a minim) and save as default, so that’s how it’s setup for all your future projects."
For the natural harmonics don’t use the properties to create the harmonic use the performance instruction and it will only appear on the first notehead.