It did it after I upped my queue to 2k files.
When I started using qB again I told myself that it was unstable, prone to screwing me as a user, and that when it did I would have only myself to blame. When I switched before I went to Deluge and found that it is more stable yet qB pulls in faster. Items that had been in the queue since December 2015 are missing! When qB was opened post reboot I had a queue of ~560 items and everything was in a different order (very important when you queue multiple torrents to get the same file as you can't be sure which will actually have a seed and come in). I am here now because most recently I told my computer (Debian Jessie, Gnome) to reboot and had a queue of ~2170 items, mostly added via magnets (including over 1k torrents from ONE long research dig on ONE topic). Ok, I have experienced this (or something like it) multiple times over the years and it has driven me away from qB before (the integrated search engine brought me back as it really suits my work style, but with btdigg gone it produces next to no results now). 20:17:16 - qBittorrent is trying to listen on any interface port: TCP/6881 20:17:16 - HTTP user agent is qBittorrent v3.1.12 20:17:16 - Local Peer Discovery support 20:17:16 - Options were saved successfully. 20:17:16 - The Web UI is listening on port 8080 20:17:17 - qBittorrent is successfully listening on interface 0.0.0.0 port: TCP/4433 20:17:17 - qBittorrent is successfully listening on interface :: port: TCP/4434 20:17:17 - qBittorrent is successfully listening on interface 0.0.0.0 port: TCP/6881
20:17:17 - qBittorrent is successfully listening on interface :: port: TCP/6881 20:17:18 - UPnP/NAT-PMP: Port mapping successful, message: successfully mapped port using UPnP.