Off the top of my head it looks like either an extension is getting in the way or Visual Studio is corrupted. The Microsoft.DataWarehouse
item peaks my interest as problematic.
My first suggestion would be to ensure you have no updates for VS that need to be installed, including extension. Next I would recommend you create an empty SSIS package and try adding a new package configuration to see if the problem exists in a new package or not.
The last suggestion would be to repair the VS installation and reinstall the SQL Server Integration Services extension.
If none of that works then you might need to use the Report a Problem feature in VS to report the issue to the team so they can look at it directly.