That's odd. Could you try uninstalling the app updates, restarting your device and reinstalling them? Let us know if that does the trick.
That's odd, could you file a feedback report with these steps: https://goo.gl/1ckkO5 ? We review all the feedback sent to us, but YouTube doesn't necessarily respond to every single one. We use the info to identify and fix issues, as well as track requests and make improvements.