qBittorrent was not seeding and after maximizing its window, it was empty, only window frame and bar

[slrslr]

Hello, on Linux Arch with XFCE, i am running 4.4.0beta3 and i have noticed on a bittorrent tracker that my torrents have 0 seeders for days and when i came back to computer and maximized qbt window, i have seen only window frame, bar but not content, after a few minutes i switched back to the window and seen that it started being active and the internet traffic significantly risen. So i am unsure why qbt stopped its activity and wondering how to debug this.

grep -i log ~/.config/qBittorrent/qBittorrent.conf

...
Log\Enabled=true
Log\Types=-1
...

tail ~/.config/qBittorrent/qbittorrent.log
shows indeed the big gap of log entries where latest before gap is:

W) 2021-10-15T08:50:07 - Upozornění na chybu souboru. Torrent: "abc". Soubor: "pathhere". Příčina: abc file_open (pathhere) error: No such file or directory

i see that in that log file such file error notice for this particular torrent is 1479 times, seems alot considering the log records only 4 days runtime. Ideas or what to try please? Maybe next time this happen so i can supply more targeted debug info.