I have a property that is a multi-select ("Product Mix") and if I select a few options that all show on one line (i.e. selecting 3 options from the dropdown list) and then click away from that property, if I come back to the property to try and select more options from the dropdown, the mouse hover action brings up the edit pencil and details box and they cover up the dropdown menu arrow for the property field.
I can bring the dropdown options back up if I click one of the currently selected options but most users are not going to think to do that because most would assume clicking the existing option choice would deselect it. I think a lot of our users (many who are not technically-inclined) are going to feel like they can't select more options because the dropdown arrow is covered up.
