OS: Windows 10 Pro 10.0.19045

1. Click the sort button multiple times, in my case, 3 times is enough for all the lists to dissapear
2. After doing that, no mods will be shown in either the inactive or the active lists, and the official expansions won't appear either
   
3. Clicking any button that updates the list, such as sort, clear, restore, etc, will make the mods visible again