Problem getting magnet metadata on large files

I use the utility https://github.com/fbdtemme/torrenttools under Ubuntu Linux to create torrent files.

Example launch for creating a torrent:
```
$ ls -l t/
total 16188932
-rw-rw-r-- 1 sbs sbs 16577458723 jan 9 11:22 Taxi.Driver.1976.1080p.BluRay.DTS.x264-EbP.mkv

/opt/torrentools/torrenttools create "t" --include ".*t/Taxi.Driver.1976.1080p.BluRay.DTS.x264-EbP.mkv" --piece-size 16M --announce "http://192.168.1.100:2710/announce" --output taxi-diver.torrent
```

For seeding I use rtorrent v0.9.8-r16 https://github.com/jesec/rtorrent

**Problem**:
For files of about 15GB or more size, projects using the anacrolix/torrent library cannot receive magnet metadata when adding content via magnet URL.
I tested with https://github.com/YouROK/TorrServer and https://github.com/anacrolix/confluence

If i run the torrent file, there is no problem.

Another client, qBittorrent, receives metadata without any problems.

Traffic dump examples:
anacrolix - https://drive.google.com/file/d/1cYpwLi7oVZbwbjTEdX0qGUFa3BJufIfb/view?usp=sharing
qBittorrent - https://drive.google.com/file/d/1pL02zladqigEyOfGVJGApNAAQZGM3Cab/view?usp=sharing