Fix bug: number of downloads for a torrent is reset #2743

Job	Run time
Build on ubuntu-latest (stable)	3m 27s
Formatting	24s
Build on ubuntu-latest (nightly)	3m 19s
Build on macos-latest (stable)	4m 25s
Build on windows-latest (nightly)	6m 13s
Build on macos-latest (nightly)	4m 31s
Build on windows-latest (stable)	8m 34s
Static Analysis (stable)	2m 6s
Static Analysis (nightly)	2m 2s
Units (stable)	13m 34s
Units (nightly)	12m 27s
E2E (nightly)	20m 37s
E2E (stable)	20m 24s
	1h 42m 3s

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