This issue is not reproducible in ArcGIS Online December 2020 release, and ArcGIS Hub release updates.
解决办法
Search for the item on the ArcGIS Hub site. There are no issues when searching for the item, and accessing it for the first time.
Follow the following workaround to share the item page:
Give the user the URL to the ArcGIS Hub site, and have the user to search and access the item through there.
Give the user the URL to the item with the item ID (The title of the item is reverted to its original title, the item ID must be found in the URL when editing the item in ArcGIS Hub).