Old story: you submit a new version of an app only to find the next day that you still have a place where a crash occurs. In my case I “developer rejected” the review submission and uploaded a new build. Only to find that 19 hours later – on the next day – it is still not available to be attached to the version for submission.
People on Twitter told me that they are having the same issues too every now and then. Apparently for some they can jigger it lose by refreshing the TestFlight iOS-Builds page every few seconds. A few individuals even do that with a chrome extension that reloads the page every 15 seconds.
So, time for a Radar: filed as rdar://23409291 and on OpenRadar.