Since gaming now lives at http://YouTube.com/gaming , the old Gaming app is going away on May 30th! If you were subscribed to channels in the Gaming app, they’ll automatically move to your YouTube subs feed on May 14th. More need-to-know info→ https://yt.be/help/yRe4
Couldn't you at least put a confirmation button to carry over the subscriptions first? like something like "Would, you like to pass you YTG subscriptions to your regular account". I was so confused when I saw all the people that I unsubscribed years ago, now reappearing again.