Every once in a while the modules stop working. When this happens I turn on edit mode, unlock and relock the panel movement, then exit the edit mode and they work fine.
Also just changing the list options to spin then back to another view, many strange things happen, mainly you have to discard it and call up another and start over.
I think the list has been around for quite some time and if the devs have time it might be nice to check the code. Not a problem since I found a workaround, just thought the dev's should know.