I am using the latest wordpress and latest bbpress.
I can recreate it. It was the first thing I did before posting here in fact :P. Being a software dev it was step 1. I created a new user account the same as all my users, I made a post on a forum and also tried replying to 1. I then clicked the edit button, it opened the edit form which showed all of the wordpress posts. When I use my Key Master account, I don’t see this, I am able to edit properly. Same goes for my other admins who have been editing there posts