This worked properly for me until I installed the mod "no longer Lookup failed with the vault 111 suit". After installing that, FDI would change the interface layout but not show the expanded lines of dialog. After disabling that other mod and reinstalling FDI, it's working properly again.
I realize that the comments here are old, but maybe this will help someone else who's currently experiencing this issue.
if you use Unofficial Fallout 4 Patch it make some dialog to original state i just have the same problem and i just disable Unofficial Fallout 4 Patch and dialog full again
Dialouges are still vanilla?! (6 comments)
I realize that the comments here are old, but maybe this will help someone else who's currently experiencing this issue.