New build disappears after uploading it to iTunes Connect

Question

I\'m trying to upload a build to iTunesConnect with Xcode 8. Xcode shows me that the uploading is successful. In Activity tab of iTunesConnect I see that my build is appears and

Answer 1

Build disappeared. Wondered why, but did nothing. 12 hours later, was notified that it has completed processing and I was able to deploy it to TestFlight testers.

Thought perhaps it was because I accidentally uploaded an archive of my previous .ipa first via the Application Loader, rather than the newly exported one. But this may be just random circumstances. Either way, I did nothing, and it reappeared—albeit 12 hours later when often processing has been completing in about 20-30 minutes recently.