There is a bug in og_menu that removes the og menu affiliation when a node that has been placed in a group is saved.

As a short term fix, we should pin the version of og_menu to f6cbebf.

Longer term, we should seriously evaluate whether OG Menu stays in the stack, or is replaced with a more reliable solution.

The related issue in the og menu queue is at #1847110: Menu affiliation lost when editing a node in a group, improve menu settings on administer node type form.