There's an upstream issue filed (and closed) for this bug: https://github.com/qbittorrent/qBittorrent/issues/6064.
It seems related to the libtorrent-rasterbar branch 1.1.x not officially supported by qbittorrent 3.3.7. The current versions of both pkgs should work fine together, so I believe this report can be closed now. Regards BZ
