Invisible Brackets

In the piece I'm arranging (alto sax + piano), there's a section where there is a cadenza. I want only the alto saxophone line visible during this section of the music (e.g. the piano staves are completely hidden).
I've managed to do this for the measures of the piano, but as for the bracket, it remains visible. Interestingly, on the program, I've made the bracket invisible and it's greyed out, indicating its invisibility, but on the website, it's completely visible.
Screenshot 5 shows what I'm seeing in the software, and 6 shows what displays on the website when the score has been uploaded.
Any help is greatly appreciated!