Follow Active Quads gives me disorted, streched UV I have a track mesh. But when I use "Follow Active Quads", generated UV has weird stretch.



Result texture also getting messed.



Every faces are connected and all of them are quads, no duplicated vertices.

Using Pack UV doesn't helped as well. What am I missing?

Here's the File link:
https://drive.google.com/open?id=1kbwjgpCO1xxRivDN4FYtssKej4NjlmXT
If you unwrap again (U) but choose Reset, then again U > Follow Active Quads, it seems to work fine. You must have unwrap wrongly at a moment, and as you didn't reset it kept it wrong (don't know why we have to reset though).