Not all content has gotten their cache rebuilt. This is required to be able to delete libraries, and to display how many contents that uses the library.
You should <strong>upgrade your H5P content types!</strong> The old content types still work, but the authoring tool's look and feel is greatly improved with the new content types. Here's some more info about <a href="%s" target="_blank">upgrading the content types</a>.
H5P now fetches content types directly from the H5P Hub. In order to do this, the H5P plugin will communicate with H5P.org once per day to fetch information about new and updated content types. It will send in anonymous data to the hub about H5P usage. You may disable the data contribution and/or the H5P Hub in the H5P settings.