Problem with overlapping polygons in Neatline

I’ve recently started building a project site by using Neatline. I’ve set my server and installed Omeka and Neatline. For the last couple of days I’m experimenting with it and seems like everything is working smoothly except a major issue. When multiple polygons overlap with each other and one polygon is entirely covered by another one, the smaller polygon that is underneath the larger ones cannot be accessed and clicked. Is there a way to fix this?