bittorrent protocol

it happens sometimes that torrent contains one big file (like movie), and several unimportant small files (like info, screenshots..).
the unimportant files get lost over time, so when someone wants to 'revive' torrent, it gets stuck at 99%.

I guess the new seed could make fake small files with hash collisions.
or, the protocol itself could be modified so that in these cases, people can ask and download incomplete chunks somehow?
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