While looking into another post here about linetypes, I noticed that the linetype preview on the properties inspector doesn't refresh when selecting objects of differing linetypes. Attached is a test drawing using 4 different linetypes on 4 layers named reflecting their type.

As shown in the screenshots, it is possible to select a line and have it shown correctly, however selecting another line of a different type maintains the same preview. It is only updated when the dropdown box is selected, then it is refreshed.

This small preview should be updating to reflect the linetype used.