Ride the Ley Line Bug or by design
Read the tooltip…
“Warning: Crossing streams with other ley lines is deadly!”
This is most definitly on the wiki too.
Working as described and intended.
Kitten.
It even is the very opposite of a bug.
Quoting the wiki: Don’t Cross the Streams was the result of a fix to a bug where "Using the gliding skill “Ride the Leyline” while inside a leyline would shoot you into the top of the map at the max velocity possible in the game."
It also earns you an achievement when you do it the first time. (It’s actually hidden untill you unlock it in the Bloodstone Fen tab)