Thank you very much! I think I may have found the issue and solution. I enabled this option: https://i.imgur.com/PkO33Pb.png
It changes how the search tries to interact with the theme, and it appears to be working now. I tried to search for “activity”, which should not yield any results (the live search looks okay), then after enabling that option the results page seems to be okay as well (not showing any results for that query anymore).
