When in Edition Group and adding an edition through  [+ Add Edition], it correctly links the edition to the group, but also creates what appears to be superfluous edition relationships.

For an example, see this edition group:
https://beta.bookbrainz.org/edition-group/dd9776d2-aec1-4d30-aa45-0687f380c1b4

I just recently added the Gutenberg edition:
https://beta.bookbrainz.org/edition/e1c100cf-a32a-4b70-88d6-d5ce5bf3b6f8