Setting qBittorrent 5 listening port while running seems to be ignored

[Aldaviva]

After upgrading from qBittorrent 4 to 5, this program seems to have trouble setting its listening port while qBittorrent is running, using the HTTP API. There are no error messages, but the port does not get updated, even when restarting this program. I verified that I can set the port using the web UI and that the API request is the same, including path, body, and authentication. I also verified that piactl was returning the correct forwarded port number, both in immediate and streaming monitor mode.