Under the related list of any form, each record will have a related information (i) icon.
For any related list, which is coming from the many to many relationship, the (i) icon will display only the mapping/relation between between two records. It will not display the record details. It is OOB expected behavior/design.
To get the record details, user needs to click on the very first column of the related list which has a hyperlink(underlined).