Fix bug: number of downloads for a torrent is reset #2742

Job	Run time
Build on ubuntu-latest (nightly)	3m 21s
Formatting	14s
Build on ubuntu-latest (stable)	3m 38s
Build on macos-latest (nightly)	4m 24s
Build on macos-latest (stable)	5m 9s
Build on windows-latest (nightly)	6m 49s
Build on windows-latest (stable)	6m 46s
Static Analysis (nightly)	2m 2s
Static Analysis (stable)	2m 6s
Units (nightly)	12m 17s
Units (stable)	13m 11s
E2E (nightly)	20m 12s
E2E (stable)	21m 45s
	1h 41m 54s

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