So .. with the variability of who has this problem and who doesn't .. maybe a list of continent/times that the lists are accessed and having this problem. Maybe those having the problem are in the same area and either there are different servers in different areas or the distance to the central server is causing a delay in the update or receiving the information for some strange reason ..
For example: It is prime time UK for me and the list was fine. Considering Frontier is in the UK it could mean I have almost instant access.
Also, someone on steam who has had the same problem for hours did a ton of toggling back and forth and the list appeared. So it could be a refresh list delay or an intermittent bug with the filter system.