I think that you need an Apple Developer account to check the status from their bug tracking system.
You can not view check the status of bugs other than your own even with a dev account.
However, you can open another bug report so that Apple can evaluate the impact of this issue and prioritize the fix for it.
Since it appears that Apple uses duplicate radar reports as a measure of priority, this methodology would only be applicable if the report was identical to others for the same issue. Now, take that with a grain of salt, as this depicts what I’ve found on the internets in reference to the bug reporting system in general.
All of that said, I can confirm we’re also seeing the issue of the missing scrubber for nDVR time shifting on both IOS 8.x and IOS 9.x.