When shiv players say dash, we mean pressing our 2. It's different from wall sliding. Pressing our 2 into a wall literally gets us stuck inside the wall for 2-3 seconds.
Was just about to make the same bug report for this, when doing jungle and using slice and dice the character frequently gets stuck in the walls and gets unstuck after a couple seconds. Sometimes I also see the option to cancel slice and dice when I'm stuck which is interesting.