The behavior that is listed in the bug details is not reproducible anymore. Please note that "When you transfer the ownership of an item shared with one or more groups, the new owner must be a member of all groups with which the item is shared." Refer to https://doc.arcgis.com/en/arcgis-online/administer/manage-items.htm#ESRI_SECTION1_F9D72CA4252E4EB18F4B081C27ADF527 for more information.
解决办法
Remove the content from all groups (shared-update and other groups included), and change the ownership.
After changing the ownership, re-share the content with the appropriate groups.