I've found the following bug in RVGL 19.0120a:
When choosing a track by typing in a filter expression (for example at a Time Trial Race), this filter will be kept inside the "Best Time Trials" menu item. There is no possibility to remove the filter inside this menu. After removing the filter in the track selection, the filter will also be removed in the "Best Time Trials" menu.
This only happens, after a race will be started after the filter was typed in.
I did a video, to demonstrate. First I filter for "Toy", then for "Super". Both times with the same results. In between, I filter also for "Super", but without starting the race. Here you can see, that there is no issue when doing it this way.