I did make sure to turn out the warp mode and double-check if it works. It did work. However, if the border edge gets distorted or not straight, the tiling won't work correctly anymore. Turning on symmetry sounds good. I tried to turn on Active Symmetry in Zbrush (if that's what you mean). However, the result didn't turn…
I think you shouldn't have to deal with this fix up process at all - it's an unnecessary step. for horizontal tiling things it's easy enough to just enable symmetry on the texture border area - no need for wrap mode action. But even fully tileable (with wrap mode) is quite doable, you just need to do the setup very…