I have one page filtering a dataset in 2 different ways:
1. one shows to which event(s) a member of our group has registered;
2. another shows which member(s) has registered to which event(s).
Each of these filtering works on its own.
On desktop view, when I first filter by the second way (#2. above) and then first method (#1. above), it all works fine (at the end, I have a table of which event the member has registered). When I do the exact same on mobile view, it bugs and shows the same sort of table but replaces the first 2 columns with the date and place of event (when it shows the last and first names on desktop views as it is supposed to do).
You can try on www.shanghai-gc.com/registrations (only November and December events are referenced so far).