The phrase "complicated issue" means a problem or topic that is difficult to understand or solve, usually due to having many different factors or complexities involved. Full definition
Address complicated issues of identity and belonging in your classroom with this collection of readings. (facinghistory.org)
And to further complicate the issue scripture sometimes provides confusing and opposite instructions, making it possible to select whichever «proof text» fits one's agenda. (nakedpastor.com)
Some babies will require being delivered in advance, especially if there are many more complicated issues suspected in the womb. (babygaga.com)