Icon Error

Hi,
Its the first time i try to use your plugin and i have some problem with them.
I installed and try to use the shortcode [expand title=”Trigger Text”]Target Content[/expand]

1) When i loaded the page the plugin look works well
Image: https://i.imgur.com/qWjGjM6.png

2) When i click in the option to show the content, he create a second icon
Image: https://i.imgur.com/IWtpptG.png

3) If i try to collapse / close the content, he still with the second icon.
Image: https://i.imgur.com/kxi5B4M.png

I try to found in support forum a similiar problem, but i dont found.
Can you help me?