We are seeing an issue with asset products on Asset Store that have input system as a dependency.
When importing, the process starts with the importing of packages and input system asks for an editor restart to complete project settings changes to new system. This interrupts the import of the asset files and users are confused that they did not get their files. The workaround we have is telling users to hit import twice, which obviously is not a good UX.
Currently this affects Starter Assets and Enemies