Dash over wall glitches

So the other day I was trying in a 9 bot custom game. And around lvl 6~9, I used my E to dash over purple side wight(or what used to be the wight) wall. I got across, screen froze for half a second, and I was back to the other side of the wall somehow. No, I didn't . I thought it was just me lagging out, but then just yesterday, I saw a ward hop over a wall, and immediately got back to the other side again. This is prolly gonna really rip someone's butt in half if they'r legendary, being chased 1v5, and attempting to flash over walls.