You did use the TL-FD90 fixture to determine whether you need to move the converter didn't you? Page 10 of the link below.
https://si.shimano.com/api/publish/s...002-05-ENG.pdf
Though I'm wondering if this isn't just that the cable routing from the frame is just poor for that front DR. What bike is this? Maybe your seat tube angle makes routing for that model DR a little harder?