It doesn't even compute. It doesn't even make any sense, in how they use it in relation to the topic.
Are the issues at right angles of one another? No.
Are the issues statistically independent of one another? Perhaps.
I suggest to use a more appropriate descriptive word to describe the situation.
You folks should read the urban meaning of orthogonal, to understand how people roll their eyes at you, when you inappropriately use the term.
https://www.urbandictionary.com/define.php?term=orthogonal
Just another friendly PSA.