does youtube delete legitimate subscribers?

UBTC

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Nov 20, 2021
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Hello, I have been keeping precise management of my subscribers in Excel for several weeks. Obviously this only concerns subscribers who do not hide their subscriptions.
It sometimes happens from one day to another that a subscriber disappears in my list.
I then go on the channel of this subscriber and strangely I see that I am still in the list of channels to which he is subscribed.

How can this append?

My channel is a Musical backing track channel and my subscribers are mostly guitar players who appreciate my channel.