On the Version Comparison page, it is possible that you will see a "Needs Investigation" banner at the top of an app version.
The banner will appear if the current version in comparison to the previous, falls by a specific threshold in one or more of the following categories: Crashes: 0.003, Terminations 0.01, Force quit 0.003, Uncategorized Exit, "UE" 0.005 for iOS and OOM 0.003 for Android.