We recently combined YouTube and YouTube Gaming subscriptions, so any channel you’ve subscribed to in one app will now appear in the other app. Here’s more info on the update in case it’s related: https://goo.gl/zcwpLa . Let us know if otherwise.
Appreciate the info. Please send a feedback report directly from YouTube with these steps: https://goo.gl/WdI0BK . While every individual report may not get a direct response, we do review everything and use the details to investigate and fix issues. Thanks!