Index sliding panel

Hello, thanks again for the wonderful plugin. I have a problem while building a page with the sliding panel, directly in the backend while building the page with this panel. I made a series of three images in a row with a button underneath to open this panel. Up to here everything is going very well. The problem is when I create two more rows with 3 more buttons. We therefore have the first row all ok, the last or third row all ok but the second, when I open the panel to insert the content, is partially hidden by the third row. Practically during the construction, the index of the panel seems to be smaller than the other rows with the same content, so it remains difficult to insert the content easily. I have already tried to insert a greater index to the panel but nothing happens. In the frontend, however, this problem does not appear. It only happens in the backend which is hard to deal with sadly. Otherwise great plugin!