qBittorrent stopped uploading/downloading on public torrent

[Fooftilly]

For the last three days, I haven't been able to get qBittorrent to upload or download any public torrents. Public torrents stay stalled with the message “Not contacted yet” on the trackers. Private torrents work as expected, and their trackers are connectable. The only public torrents that download successfully are those that include HTTP sources.

I’ve tried many fixes I found in similar discussions, such as: changing the peer connection protocol to TCP only, changing the port, disabling UPnP in qBittorrent (I also port-forwarded the qBittorrent port in the router settings), disabling rate limits for the μTP protocol and transport overhead, disabling and re-enabling DHT, PeX, and Local Peer Discovery, and binding the network interface to wlan0 and the IP address to IPv4.

I also tested whether the issue might be with my home network and concluded that it isn’t, because the problem persists even when I connect through a mobile hotspot from a different carrier (which I’ve used for torrenting before without issues). I’m on Linux, and I’ve tested qBittorrent in Docker — the Docker instance worked perfectly. I’ve also tested qBittorrent on Windows, and it worked there as well.

Does anybody have other ideas as to what I can do?

Specs:
Qt: 6.10.0
Libtorrent: 2.0.11.0
Boost: 1.89.0
OpenSSL: 3.6.0
zlib: 1.3.1

qbittorrent.conf:

[AddNewTorrentDialog]
DialogSize=@Size(1536 805)
DownloadPathHistory=
RememberLastSavePath=false
SavePathHistory=/home/nikola/000media/torrent

[AddTrackersDialog]
Size=@Size(367 274)
TrackersListURL=https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_best.txt

[Application]
FileLogger\Age=1
FileLogger\AgeType=1
FileLogger\Backup=true
FileLogger\DeleteOld=true
FileLogger\Enabled=true
FileLogger\MaxSizeBytes=66560
FileLogger\Path=/home/nikola/.local/share/qBittorrent/logs
GUI\Notifications\TorrentAdded=false

[BitTorrent]
MergeTrackersEnabled=true
Session\AnnounceToAllTrackers=true
Session\BTProtocol=Both
Session\DefaultSavePath=/home/nikola/000media/torrent
Session\Interface=
Session\InterfaceAddress=
Session\InterfaceName=
Session\Port=61197
Session\QueueingSystemEnabled=false
Session\SSL\Port=56147
Session\StartPaused=false
Session\Tags=finished, private, public, publicprivate
Session\UseAlternativeGlobalSpeedLimit=false
Session\uTPMixedMode=Proportional

[Core]
AutoDeleteAddedTorrentFile=Never

[GUI]
DownloadTrackerFavicon=false
Log\Enabled=true
MainWindow\FiltersSidebarWidth=163
Qt6\AddNewTorrentDialog\SplitterState=@ByteArray(\0\0\0\xff\0\0\0\x1\0\0\0\x2\0\0\x2i\0\0\x3m\0\xff\xff\xff\xff\x1\0\0\0\x1\0)
Qt6\AddNewTorrentDialog\TreeHeaderState=@ByteArray(\0\0\0\xff\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x6\x34\0\0\0\x3\0\0\0\x5\0\0\0\x64\0\0\0\x2\0\0\0\x64\0\0\0\x4\0\0\0\x64\0\0\x3i\0\0\0\x6\x1\x1\0\x1\0\0\0\0\0\0\0\0\0\0\0\0\x64\xff\xff\xff\xff\0\0\0\x81\0\0\0\0\0\0\0\x6\0\0\x1\x38\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\x1\xcd\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\x3\xe8\0\0\0\0\x64\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1)
Qt6\TorrentProperties\FilesListState=@ByteArray(\0\0\0\xff\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x5\x46\0\0\0\x6\x1\x1\0\x1\0\0\0\0\0\0\0\0\0\0\0\0\x64\xff\xff\xff\xff\0\0\0\x81\0\0\0\0\0\0\0\x6\0\0\x2s\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\x1\x43\0\0\0\x1\0\0\0\0\0\0\x3\xe8\0\0\0\0\x64\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1)
Qt6\TorrentProperties\PeerListState=@ByteArray(\0\0\0\xff\0\0\0\0\0\0\0\x1\0\0\0\x1\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\xf\\@\0\0\0\x5\0\0\0\xe\0\0\0\x64\0\0\0\x6\0\0\0\x64\0\0\0\x4\0\0\0\x64\0\0\0\x2\0\0\0\x64\0\0\0\x3\0\0\0\x64\0\0\x3\xbf\0\0\0\xf\x1\x1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x64\xff\xff\xff\xff\0\0\0\x81\0\0\0\0\0\0\0\xf\0\0\0\x31\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0n\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\x3\xe8\0\xff\xff\xff\xff\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1)
Qt6\TorrentProperties\TrackerListState=@ByteArray(\0\0\0\xff\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\v\x6\0\0\0\0\x2\0\0\0\x2\0\0\0\x64\0\0\0\x1\0\0\0\x64\0\0\x5m\0\0\0\v\x1\x1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x64\xff\xff\xff\xff\0\0\0\x81\0\0\0\0\0\0\0\v\0\0\x2\x32\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0u\0\0\0\x1\0\0\0\0\0\0\0\x31\0\0\0\x1\0\0\0\0\0\0\0\x35\0\0\0\x1\0\0\0\0\0\0\0\x42\0\0\0\x1\0\0\0\0\0\0\0\x84\0\0\0\x1\0\0\0\0\0\0\0\xc7\0\0\0\x1\0\0\0\0\0\0\0k\0\0\0\x1\0\0\0\0\0\0\0h\0\0\0\x1\0\0\0\0\0\0\x3\xe8\0\xff\xff\xff\xff\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1)
Qt6\TransferList\HeaderState=@ByteArray(\0\0\0\xff\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\x1\x1\0\0\0%\0\0\0\0\0\0\0\x1\0\0\0\x3\0\0\0\x4\0\0\0\x5\0\0\0\x2\0\0\0\a\0\0\0\b\0\0\0\t\0\0\0\n\0\0\0\v\0\0\0\x6\0\0\0\xe\0\0\0\xf\0\0\0\x10\0\0\0\x11\0\0\0\x12\0\0\0\x13\0\0\0\x14\0\0\0\x15\0\0\0\x16\0\0\0\r\0\0\0\x17\0\0\0\f\0\0\0\x18\0\0\0\x19\0\0\0\x1a\0\0\0\x1b\0\0\0\x1c\0\0\0\x1d\0\0\0\x1e\0\0\0\x1f\0\0\0 \0\0\0!\0\0\0\"\0\0\0#\0\0\0$\0\0\0%\0\0\0\0\0\0\0\x1\0\0\0\x5\0\0\0\x2\0\0\0\x3\0\0\0\x4\0\0\0\v\0\0\0\x6\0\0\0\a\0\0\0\b\0\0\0\t\0\0\0\n\0\0\0\x17\0\0\0\x15\0\0\0\f\0\0\0\r\0\0\0\xe\0\0\0\xf\0\0\0\x10\0\0\0\x11\0\0\0\x12\0\0\0\x13\0\0\0\x14\0\0\0\x16\0\0\0\x18\0\0\0\x19\0\0\0\x1a\0\0\0\x1b\0\0\0\x1c\0\0\0\x1d\0\0\0\x1e\0\0\0\x1f\0\0\0 \0\0\0!\0\0\0\"\0\0\0#\0\0\0$\0\0\0%\x91\xc9\xff\xbd\x1f\0\0\0\x1a\0\0\0\xe\0\0\0\x64\0\0\0$\0\0\0\x64\0\0\0\x1d\0\0\0\x64\0\0\0\x13\0\0\0\x64\0\0\0\xf\0\0\0\x64\0\0\0\0\0\0\0\x64\0\0\0\x18\0\0\0\x64\0\0\0\x6\0\0\0\x64\0\0\0\x1a\0\0\0\x64\0\0\0\n\0\0\0\x64\0\0\0\x1b\0\0\0\x64\0\0\0\x14\0\0\0\x64\0\0\0\x11\0\0\0\x64\0\0\0\x12\0\0\0\x64\0\0\0\x1c\0\0\0\x64\0\0\0#\0\0\0\x64\0\0\0!\0\0\0\x64\0\0\0\a\0\0\0\x64\0\0\0\x1f\0\0\0\x64\0\0\0\x3\0\0\0\x64\0\0\0\r\0\0\0\x64\0\0\0\f\0\0\0\x64\0\0\0 \0\0\0\x64\0\0\0\x10\0\0\0\x64\0\0\0\x16\0\0\0\x64\0\0\0\"\0\0\0\x64\0\0\x5\x8e\0\0\0%\x1\x1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x64\xff\xff\xff\xff\0\0\0\x81\0\0\0\0\0\0\0%\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\x2\x30\0\0\0\x1\0\0\0\0\0\0\0P\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x33\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0[\0\0\0\x1\0\0\0\0\0\0\0I\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0j\0\0\0\x1\0\0\0\0\0\0\0L\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0U\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\x3\xe8\0\0\0\0\x64\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1)
StartUpWindowState=Normal

[LegalNotice]
Accepted=true

[MainWindow]
geometry=@ByteArray(\x1\xd9\xd0\xcb\0\x3\0\0\0\0\0\0\0\0\0\0\0\0\x5\xff\0\0\x3\x41\0\0\0\0\0\0\0\x1d\0\0\x5\xff\0\0\x3\x41\0\0\0\0\0\0\0\0\x6\0\0\0\0\0\0\0\0\x1d\0\0\x5\xff\0\0\x3\x41)

[Meta]
MigrationVersion=8

[Network]
PortForwardingEnabled=true

[OptionsDialog]
HorizontalSplitterSizes=172, 761
LastViewedPage=8
Size=@Size(954 655)

[Preferences]
General\CloseToTrayNotified=true
General\HideZeroValues=true
General\Locale=en
General\StatusbarExternalIPDisplayed=true
WebUI\Enabled=true
WebUI\LocalHostAuth=false
WebUI\Password_PBKDF2="[REDACTED]"
WebUI\Port=8088

[RSS]
AutoDownloader\DownloadRepacks=true
AutoDownloader\SmartEpisodeFilter=s(\\d+)e(\\d+), (\\d+)x(\\d+), "(\\d{4}[.\\-]\\d{1,2}[.\\-]\\d{1,2})", "(\\d{1,2}[.\\-]\\d{1,2}[.\\-]\\d{4})"

[SpeedLimitDialog]
Size=@Size(481 290)

[SpeedWidget]
period=1

[TorrentOptionsDialog]
Size=@Size(489 698)

[TorrentProperties]
CurrentTab=3
SplitterSizes="311,356"
Visible=true

[TrackerEntriesDialog]
Size=@Size(506 500)

[TransferList]
SubSortColumn=11
SubSortOrder=1

[TransferListFilters]
HideZeroStatusFilters=false
selectedFilterIndex=6
trackerFilterState=true