So sometimes the wrong pad is found. Changing the pad id in the NuGet extensions addin should fix this. Perhaps a better fix would be to change the progress monitor code to check the pad id starts with "OutputPad-PackageConsole" which should handle the case better.
The pad id contains PackageConsole which clashes with this check in the main NuGet addin:
https://github.com/mono/monodevelop/blob/master/main/src/addins/MonoDevelop.PackageManagement/MonoDevelop.PackageManagement/PackageManagementProgressMonitorFactory.cs#L76
So sometimes the wrong pad is found. Changing the pad id in the NuGet extensions addin should fix this. Perhaps a better fix would be to change the progress monitor code to check the pad id starts with "OutputPad-PackageConsole" which should handle the case better.